---
title: "Web Performance, Security & SEO Guides"
description: "Practical guides to optimize web performance, edge security, technical SEO, and AI-search readiness."
canonical_url: https://optimi.com/en/guides
md_url: https://optimi.com/en/guides.md
---

# Web Performance, Security & SEO Guides

Practical guides to optimize web performance, edge security, technical SEO, and AI-search readiness.

## In this section

- [Multi-CDN Explained](/en/guides/multi-cdn-strategy.md): Learn when a Multi-CDN architecture is justified, how to steer traffic safely, and how to test failover without creating cache or security gaps.
- [Crawl Budget](/en/guides/crawl-budget.md): Understand crawl budget, crawl capacity, crawl demand, robots.txt, sitemaps, redirects, duplicate URLs, and the fixes that help search engines focus on valuable pages.
- [CDN Caching Explained](/en/guides/cdn-caching.md): Learn how CDN caching works, which assets and responses are safe to cache, how cache keys and purges work, and how to avoid serving private data publicly.
- [Cache-Control Guide](/en/guides/cache-control.md): A practical Cache-Control guide with safe patterns for static assets, HTML, APIs, private data, shared CDNs, revalidation, and stale responses.
- [RUM vs Synthetic Monitoring](/en/guides/rum-vs-synthetic-monitoring.md): RUM and synthetic monitoring answer different performance questions. Learn when to use each, how to combine them, and how to turn signals into action.
- [Web Performance Budgets](/en/guides/web-performance-budgets.md): A practical method for setting, enforcing, and reviewing web performance budgets across page weight, Core Web Vitals, third parties, and delivery paths.
- [Log File Analysis](/en/guides/seo-log-analysis.md): Use server and edge logs to see how search crawlers really access your site, uncover wasted crawl activity, and connect SEO problems to infrastructure events.
- [CDN Cache Misses](/en/guides/cdn-cache-misses.md): Learn how to distinguish a real cache miss from a bypass or revalidation, find the root cause, and improve CDN cache efficiency without caching private data.
- [Cache Warming Explained](/en/guides/cache-warming.md): Learn how cache warming reduces cold-cache latency, which URLs to warm, how to avoid stale or unsafe content, and what to measure at the edge.
- [Core Web Vitals Guide](/en/guides/core-web-vitals.md): Understand LCP, INP, and CLS, their current good thresholds, how to measure them in field and lab data, and which fixes to apply first.
- [Cache Purging Without Downtime](/en/guides/cache-purging.md): Learn how to invalidate CDN content safely with scoped purges, versioned assets, stale serving, verification, and rollback procedures.
- [Static vs Dynamic Content](/en/guides/static-vs-dynamic-content.md): Learn what to cache at the edge, how to handle dynamic and personalized content, and how to verify cache correctness without leaking data.
- [Speed Up a Slow Website](/en/guides/speed-up-slow-website.md): A practical 2026 checklist for diagnosing and speeding up a slow website, from TTFB and Core Web Vitals to images, JavaScript, caching, and CDN delivery.
- [WAF Configuration Guide](/en/guides/waf-configuration.md): A practical WAF configuration guide covering managed rules, safe rollout, exceptions, false-positive analysis, testing, and continuous tuning.
- [DNS Performance Guide](/en/guides/dns-performance.md): Understand DNS lookup latency, recursive caching, authoritative DNS, Anycast, TTLs, DNSSEC, measurement, migration, and rollback for faster websites.
- [CDN Migration Guide](/en/guides/cdn-migration.md): A step-by-step CDN migration plan covering configuration parity, DNS, TLS, cache behaviour, observability, staged cutover, and rollback.
- [Peak Traffic Readiness](/en/guides/peak-traffic-readiness.md): A practical peak-traffic readiness checklist covering capacity, caching, security, load testing, observability, and incident response.
- [Ecommerce Image Optimization](/en/guides/ecommerce-image-optimization.md): A practical ecommerce image optimization guide covering AVIF, WebP, responsive sizing, LCP, layout stability, CDN delivery, and verification.
- [Cloudflare and Fastly CDN Configuration](/en/guides/cloudflare-fastly-cdn-configuration.md): A provider-neutral CDN configuration checklist covering origins, TLS, cache rules, cache keys, purges, observability, testing, and rollback.
- [Reduce TTFB](/en/guides/reduce-ttfb.md): Learn what TTFB measures, how to isolate DNS, network, CDN, application, and database delays, and which changes reliably reduce server response time.
- [Security Headers Checklist](/en/guides/security-headers.md): Use this practical security headers checklist to configure CSP, HSTS, frame protection, MIME protection, referrer controls, CORS, cookies, and reporting safely.
- [API Protection at the Edge](/en/guides/api-protection-edge.md): Configure provider-neutral API protection at the edge with an inventory, strong authentication, schema validation, quotas, logging, and safe rollout.
- [Zero Trust Web Apps](/en/guides/zero-trust-web-applications.md): Learn how to apply zero trust to web applications with a practical sequence for identity, resource policy, APIs, service-to-service access, and validation.
- [Agent Spoofing](/en/guides/agent-spoofing.md): Learn how to verify AI agents and crawlers with layered controls, signed requests, IP validation, and route-specific bot policies.
- [TLS and HTTPS](/en/guides/tls-https-web-security.md): A practical guide to TLS, HTTPS, certificates, HSTS, secure headers, edge termination, and the validation steps that keep modern web traffic protected.
- [Protect Your Origin Server](/en/guides/protect-origin-server.md): Learn how to reduce origin exposure with DNS hygiene, gateway-only access, firewall controls, authenticated edge connections, monitoring, and safe testing.
- [DDoS Protection Guide](/en/guides/ddos-protection.md): Understand DDoS protection layers, origin security, traffic controls, observability, and the response preparation required before an attack.
- [Redirects, Caching, and SEO](/en/guides/redirects-caching-seo.md): Redirect chains, cached responses, and inconsistent canonical signals can slow users and complicate crawling. Learn how to design and measure them safely.
- [Bot vs Human Traffic](/en/guides/bot-vs-human-traffic.md): Learn how to distinguish legitimate people, trusted crawlers, and abusive automation using layered signals, careful response rules, and safe monitoring.
- [Rate Limiting Guide](/en/guides/rate-limiting.md): A practical, provider-neutral guide to rate limiting APIs and web flows by identity, route, and risk without punishing legitimate customers.
- [Secure Webhooks](/en/guides/secure-webhooks.md): A practical guide to secure webhooks: webhook signature verification, webhook replay protection, idempotency, secret rotation, schemas, and safe incident handling.
- [Security Incident Response](/en/guides/website-security-incident-response.md): Build and rehearse a tested security incident response plan for website incidents: roles, evidence, edge provider escalation, customer communication, recovery, and lessons learned.
- [HTTP Status Codes and SEO](/en/guides/http-status-codes-seo.md): A practical guide to 2xx, 3xx, 4xx, and 5xx responses: how status codes affect crawling, indexing, redirects, caching, and web performance.
- [Technical SEO Infrastructure](/en/guides/technical-seo-fast-websites.md): A technical SEO checklist for edge infrastructure: DNS, HTTPS, redirects, caching, response time, Core Web Vitals, crawlability, and validation.
- [GEO vs SEO](/en/guides/geo-vs-seo.md): GEO is not a replacement for SEO. Learn how crawlability, clear content, links, structured data, and measurement support visibility in AI search experiences.
- [Website Resilience](/en/guides/website-resilience.md): Assess whether multi-CDN reduces delivery risk. Design tested failover, consistent edge policy, and recovery objectives.
- [AI Search Readiness](/en/guides/ai-search-brand-discovery.md): How AI search can change discovery. Build useful, accessible brand and product content, then measure qualified traffic and conversions.
- [Hreflang and CDN Routing](/en/guides/hreflang-cdn-routing.md): How to combine hreflang with predictable CDN routing so search engines discover the right locale and users receive fast, correct content.
- [Website Speed and Search Visibility](/en/guides/website-speed-search-visibility.md): A practical guide to the relationship between website speed, Core Web Vitals, crawling, and search visibility without overstating what performance can do.
- [JavaScript Rendering and SEO](/en/guides/javascript-rendering-seo.md): A fast browser experience is not proof that crawlers can index your content. Learn how JavaScript rendering fails and how to test the full crawl path.
- [Managed Edge vs DIY](/en/guides/managed-edge-vs-diy.md): Compare managed edge services with a self-operated CDN, DNS, WAF, and observability stack using a buyer-specific TCO, staffing, resilience, and supplier-risk framework.
- [China CDN and ICP](/en/guides/china-cdn-icp-rollout.md): Understand when Mainland China hosting or CDN delivery introduces ICP requirements, how China DNS and Cloudflare China Network work, and how to plan a phased rollout.
- [Unified Incident Timeline](/en/guides/unified-incident-timeline-cdn-waf-dns-origin.md): Correlate CDN, WAF, DNS, bot, DDoS, and origin evidence into a defensible incident timeline with provenance, confidence labels, privacy controls, and an SRE workflow.
- [E-commerce Edge Architecture](/en/guides/ecommerce-edge-architecture.md): Design an ecommerce edge that caches public catalog content safely, keeps account and checkout state private, protects origins, and applies layered bot defense.
- [Managed CDN RFP Scorecard](/en/guides/managed-cdn-partner-rfp-scorecard.md): Evaluate managed CDN partners with an evidence-led RFP scorecard covering resilience, security, observability, SLAs, commercial terms, onboarding, and exit readiness.
- [E-commerce Structured Data](/en/guides/ecommerce-structured-data-ai-search.md): Implement accurate ecommerce structured data for products, offers, shipping and returns, validate rendered JSON-LD, and avoid unsupported AI-search claims.
- [Account Takeover Defense](/en/guides/account-takeover-defense-edge.md): Build layered account takeover defenses across the edge, identity, application, and fraud stack without turning legitimate customers into false positives.
- [CDN Cost Optimization](/en/guides/cdn-cost-optimization.md): Model CDN delivery, request, origin, shielding, and observability costs. Measure byte offload and cache fragmentation before changing policy.
- [CDN Data Residency](/en/guides/global-cdn-data-residency-sovereignty.md): Evaluate CDN and edge data residency, transfers, logs, security telemetry, processor controls, and exit plans without mistaking an EU region for a compliance conclusion.
- [Media Edge Architecture](/en/guides/media-edge-architecture.md): Design a publisher edge for breaking-news spikes, public caching, paywalls, ad-tech resilience, image delivery, crawler access, and origin protection.
- [SaaS Edge Economics](/en/guides/saas-edge-economics.md): A practical framework for SaaS leaders to attribute delivery costs, design availability and tenant isolation, protect origins, and produce evidence for data-residency decisions.
- [SEO Site Migration](/en/guides/seo-site-migration.md): Plan an SEO site migration with URL mapping, permanent redirects, canonicals, hreflang, sitemaps, rendering checks, monitoring, and rollback controls.
- [Magecart Protection](/en/guides/client-side-script-magecart-protection.md): Protect payment pages from Magecart and e-skimming with script inventory, authorisation, integrity controls, CSP, SRI, tamper detection, and PCI DSS 4.0.1 guidance.
- [Preventing BOLA in APIs](/en/guides/preventing-bola-authorization-failures-apis.md): Prevent broken object level authorization and cross-tenant API exposure with object checks, tenant-scoped data access, adversarial tests, logging, and incident response.
- [Video Streaming at the Edge](/en/guides/video-streaming-at-the-edge.md): A practical guide to HLS and DASH manifests, segment caching, range requests, origin shielding, ABR, entitlement boundaries, QoE observability, and safe rollouts.
- [HTTP/3 and QUIC](/en/guides/http3-quic-production-websites.md): Deploy HTTP/3 and QUIC safely with UDP fallback, TLS 1.3, 0-RTT replay controls, proxy considerations, protocol observability, and production validation.
- [Kubernetes SRE SLOs](/en/guides/kubernetes-sre-slos.md): A practical guide to Kubernetes SLOs, error budgets, and SRE alerting: latency indicators, multi-window burn-rate rules, and release decisions for production platforms.
- [Kubernetes Observability](/en/guides/kubernetes-observability.md): Build Kubernetes observability that connects cluster health, application requests, traces, logs, and edge delivery signals to faster incident diagnosis.
- [Kubernetes Autoscaling](/en/guides/kubernetes-autoscaling.md): Configure Kubernetes autoscaling with HPA, KEDA, resource requests, queue signals, rollout safeguards, and latency-aware validation for reliable scaling.
- [Kubernetes Capacity Planning](/en/guides/kubernetes-capacity-planning.md): A practical framework for Kubernetes capacity planning: demand forecasts, resource requests and headroom, dependency limits, and cluster load testing.
- [Kubernetes Multi-Region Edge](/en/guides/kubernetes-multi-region-edge.md): Design a Kubernetes multi-region architecture with data consistency, traffic steering, health checks, regional failover rehearsals, and end-to-end latency measurement.
- [Modern Twelve-Factor Apps](/en/guides/modern-twelve-factor-apps.md): Apply the Twelve-Factor App methodology to modern services with practical guidance for configuration, processes, admin jobs, observability, Kubernetes, latency, and resilient delivery.
- [Stateless Services on Kubernetes](/en/guides/stateless-services-kubernetes.md): Design stateless services on Kubernetes with sound stateless service design and horizontal pod scaling that survive rescheduling, control dependency pressure, and preserve low-latency delivery paths.
- [Cloud-Native Config and Secrets](/en/guides/cloud-native-config-secrets.md): A practical guide to cloud-native configuration management and secrets management: typed contracts, least privilege, config rotation, Kubernetes safeguards, and operational visibility without leaking credentials.
- [Dependency Resilience](/en/guides/dependency-resilience.md): Learn dependency resilience patterns for backing services: deadlines, circuit breakers and retries, backpressure, fallbacks, observability, and cloud-native scaling safeguards.
- [Safe Container Releases](/en/guides/safe-container-releases.md): A practical guide to safe container releases: immutable container builds, supply-chain controls, database compatibility, progressive delivery, Kubernetes safeguards, and observability.
- [Distributed Systems Latency Budgets](/en/guides/distributed-systems-latency-budgets.md): Learn how to design, measure, and enforce distributed systems latency budgets, from user journeys and edge caches to services, queues, databases, circuit breakers, and origin protection.
- [Reliable API Design](/en/guides/reliable-api-design.md): A practical guide to reliable API design: explicit contracts, deadlines, API idempotency, safe caching, API rate limiting, queues, observability, and protected origins.
- [Queue-Based Load Leveling](/en/guides/queue-based-load-leveling.md): Use queue-based load leveling to absorb bursts safely with durable acceptance, idempotent workers, backlog SLOs, scaling signals, and edge-to-origin protection.
- [Edge Compute Architecture](/en/guides/edge-compute-architecture.md): Design edge compute architecture with provider-neutral edge design: safe cache keys, origin controls, edge state boundaries, observability, and portable patterns.
- [Global Edge Architecture](/en/guides/global-edge-architecture.md): Plan a global edge architecture with safe DNS and traffic steering, cache and origin design, regional failure tradeoffs, observability, and provider-neutral resilience.
- [AI Harness Engineering](/en/guides/harness-engineering-coding-agents.md): AI harness engineering designs a bounded, testable coding-agent loop with task contracts, repository context, independent controls, and reviewable delivery evidence.
- [Agent-Navigable Repositories](/en/guides/agent-navigable-repositories.md): Build agent-navigable repositories with layered instructions, a compact repository map, runnable checks, and durable handoffs that coding agents and reviewers can both trust.
- [Secure Agent Sandboxes](/en/guides/secure-coding-agent-sandboxes.md): Harden coding agent sandboxes with ephemeral credentials for agents, scoped identity, controlled egress, agent execution isolation, audit evidence, and safe recovery from policy denials.
- [Scaling Agent-First Delivery](/en/guides/scaling-agent-first-delivery.md): Scale agent-first software delivery with task claims, isolated CI capacity, review-aware queues, deterministic gates, and measured autonomy.
- [Agent Evaluation and Observability](/en/guides/agent-evaluation-observability.md): A practical framework for coding agent evaluation: versioned cases, deterministic graders, multi-trial variance, privacy-aware agent observability, and redaction proof.
- [Next.js Caching on Vercel](/en/guides/nextjs-vercel-cache-model.md): A practical guide to Next.js caching on Vercel: cache Acme Shop public catalog and database reads safely with cache boundaries and safe cache defaults, while keeping personalized responses out of shared caches.
- [Next.js Revalidation on Vercel](/en/guides/nextjs-vercel-revalidation.md): A Next.js 16 guide to Next.js revalidation on Vercel: drive on-demand ISR from one trusted Acme Shop publishing event, tag public data correctly, apply stale-while-revalidate safely, and recover without broad purges.
- [Debug Next.js Caching](/en/guides/nextjs-vercel-cache-debugging.md): A production-safe Next.js cache debugging workflow to classify Acme Shop cache behavior, read Vercel cache headers and cache HIT MISS states, and recover with the narrowest Vercel action.
- [Cloudflare Cache Rules](/en/guides/cloudflare-cache-rules.md): Configure and validate Cloudflare Cache Rules safely, with clear cache-key, origin-header, and purge responsibilities for public web content.
- [Cloudflare WAF Configuration](/en/guides/cloudflare-waf-configuration.md): A practical approach to Cloudflare WAF configuration: deploy managed and custom rules in stages, with scoped exceptions, API-safe decisions, logging practices, testing, and rollback.
- [Deploy Cloudflare Workers](/en/guides/cloudflare-workers-deployment.md): A production Cloudflare Workers deployment workflow, from edge-fit assessment through edge canary rollout, Workers observability, and rollback.
- [Cloudflare Load Balancing](/en/guides/cloudflare-load-balancing.md): Configure Cloudflare Load Balancing pools, origin health checks, steering, session affinity, and failover with capacity-aware testing, observability, and explicit rollback criteria.
- [Fastly Caching with VCL](/en/guides/fastly-caching-vcl.md): Configure and validate Fastly VCL caching with explicit TTLs, a disciplined VCL cache key and TTL contract, correct Fastly pass behavior, origin-failure handling, shielding, staged activation, and practical rollback steps.
- [Fastly Next-Gen WAF](/en/guides/fastly-next-gen-waf.md): Set up and operate Fastly Next-Gen WAF policies safely with scoped signals and exclusions, request rules, simulation, logging, staged enforcement, and rollback.
- [Fastly Compute Deployment](/en/guides/fastly-compute-deployment.md): A practical, verified guide to Fastly Compute deployment: reproducible WebAssembly edge packages, explicit service configuration, secret handling, local and staged testing, observability, and a tested Compute rollback path.
- [Fastly Origin Shielding](/en/guides/fastly-origin-shielding.md): Configure Fastly origin shielding safely by choosing a shield near each origin, assigning it per backend, verifying cache-miss behavior, monitoring logs and headers, and retaining a rollback path.

## Topics

- [AI Harness Engineering](/en/guides/tags/ai-harness-engineering.md): Build reliable coding-agent workflows with clear repository, evaluation, and delivery practices.
- [AI Search](/en/guides/tags/ai-search.md): Prepare content and technical foundations for how AI systems discover and describe your brand.
- [API Security](/en/guides/tags/api-security.md): Protect APIs from abusive traffic, authorization failures, and unsafe integrations at the edge.
- [CDN Caching](/en/guides/tags/cdn-caching.md): Design cache policies that improve speed and resilience without serving stale or private content.
- [Cloudflare](/en/guides/tags/cloudflare.md): Configure Cloudflare delivery, caching, security, and compute controls with safe operational guardrails.
- [Ecommerce](/en/guides/tags/ecommerce.md): Keep product, checkout, and discovery experiences fast, secure, and reliable under commercial traffic.
- [Edge Delivery](/en/guides/tags/edge-delivery.md): Use edge delivery to reduce latency, protect origins, and serve global traffic reliably.
- [Edge Management](/en/guides/tags/edge-management.md): Operate DNS, CDN, security, and incident controls as one measurable edge system.
- [Fastly](/en/guides/tags/fastly.md): Configure Fastly caching, WAF, origin shielding, and compute services for dependable delivery.
- [Global Delivery](/en/guides/tags/global-delivery.md): Plan resilient worldwide delivery, routing, and data-aware traffic management.
- [Kubernetes SRE](/en/guides/tags/kubernetes-sre.md): Run Kubernetes services with practical SLOs, capacity planning, observability, and safe scaling.
- [Nextjs](/en/guides/tags/nextjs.md): Understand Next.js rendering, caching, revalidation, and production delivery behavior.
- [Observability](/en/guides/tags/observability.md): Measure user journeys, infrastructure health, and incident signals before they become outages.
- [Search Visibility](/en/guides/tags/search-visibility.md): Make pages accessible, understandable, and reliable for search engines and AI discovery systems.
- [Software Architecture](/en/guides/tags/software-architecture.md): Design systems that remain fast, resilient, and understandable as dependencies and traffic grow.
- [Technical SEO](/en/guides/tags/technical-seo.md): Improve crawlability, indexing, rendering, and technical signals that support organic visibility.
- [Twelve Factor Apps](/en/guides/tags/twelve-factor-apps.md): Apply modern configuration, deployment, state, and dependency practices to cloud-native services.
- [Vendor Strategy](/en/guides/tags/vendor-strategy.md): Evaluate providers and operating models against reliability, control, cost, and delivery requirements.
- [Vercel](/en/guides/tags/vercel.md): Operate Vercel and Next.js caching, revalidation, and deployment workflows with production confidence.
- [Web Performance](/en/guides/tags/web-performance.md): Improve loading speed, Core Web Vitals, and real-user experience across every important page.
- [Web Protocols](/en/guides/tags/web-protocols.md): Use HTTP, TLS, redirects, and response behavior correctly for secure, high-performing web delivery.
- [Web Security](/en/guides/tags/web-security.md): Reduce web attack surface with practical controls for applications, APIs, origins, and users.