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Performance & CWV

Explore SEO terms under the Performance & CWV category. Learn definitions, difficulty levels, and related concepts.

⚡Page Speed

Also known as: site speed

Difficulty: Advanced

Related: lcp origin shield preconnect preload

⚡Core Web Vitals

Also known as: web vitals

Difficulty: Advanced

Related: code splitting connection pooling critical css defer vs async

⚡Site Performance

Also known as: website performance

Difficulty: Advanced

Related: service worker caching signed urls time to first byte tls handshake

⚡Time to First Byte

Also known as: TTFB

Difficulty: Advanced

Related: signed urls site performance tls handshake tree shaking

⚡LCP

Difficulty: Advanced

Related: keepalive lazy hydration origin shield page speed

⚡CLS

Difficulty: Advanced

Related: cdn tiered caching client hints code splitting connection pooling

⚡INP

Difficulty: Advanced

Related: http/2 http/3 keepalive lazy hydration

⚡TTFB

Difficulty: Advanced

Related: tls handshake tree shaking vary accept encoding vary user agent

⚡Render‑Blocking Resources

Difficulty: Advanced

Related: preload purge cache responsive images server push deprecated

⚡Critical CSS

Difficulty: Advanced

Related: connection pooling core web vitals defer vs async dns prefetch

⚡Preload

Difficulty: Advanced

Related: page speed preconnect purge cache renderblocking resources

⚡Preconnect

Difficulty: Advanced

Related: origin shield page speed preload purge cache

⚡DNS Prefetch

Difficulty: Advanced

Related: critical css defer vs async etag revalidation gzip compression

⚡Defer vs Async

Difficulty: Advanced

Related: core web vitals critical css dns prefetch etag revalidation

⚡HTTP/2

Difficulty: Advanced

Related: gzip compression heuristic caching http/3 inp

⚡HTTP/3

Difficulty: Advanced

Related: heuristic caching http/2 inp keepalive

⚡Brotli Compression

Difficulty: Advanced

Related: cache control immutable cache control max age 301 redirect 302 redirect 404 error

⚡Gzip Compression

Difficulty: Advanced

Related: dns prefetch etag revalidation heuristic caching http/2

⚡Server Push (deprecated)

Difficulty: Advanced

Related: renderblocking resources responsive images service worker caching signed urls

⚡Client Hints

Difficulty: Advanced

Related: cdn edge caching cdn tiered caching cls code splitting

⚡Responsive Images

Difficulty: Advanced

Related: purge cache renderblocking resources server push deprecated service worker caching

⚡Lazy Hydration

Difficulty: Advanced

Related: inp keepalive lcp origin shield

⚡Code Splitting

Difficulty: Advanced

Related: client hints cls connection pooling core web vitals

⚡Tree Shaking

Difficulty: Advanced

Related: time to first byte tls handshake ttfb vary accept encoding

⚡Cache TTL

Difficulty: Advanced

Related: cache control stale while revalidate cache key normalization cdn edge caching cdn tiered caching

⚡Service Worker Caching

Difficulty: Advanced

Related: responsive images server push deprecated signed urls site performance

⚡CDN Edge Caching

Difficulty: Advanced

Related: cache key normalization cache ttl cdn tiered caching client hints

⚡TLS Handshake

Difficulty: Advanced

Related: site performance time to first byte tree shaking ttfb

⚡Keep‑Alive

Difficulty: Advanced

Related: http/3 inp lazy hydration lcp

⚡Connection Pooling

Difficulty: Advanced

Related: cls code splitting core web vitals critical css

⚡Cache-Control: public

Difficulty: Advanced

Related: cache control private cache control proxy revalidate cache control s maxage cache control stale if error

⚡Cache-Control: private

Difficulty: Advanced

Related: cache control no cache cache control no store cache control proxy revalidate cache control public

⚡Cache-Control: max-age

Difficulty: Advanced

Related: brotli compression cache control immutable cache control must revalidate cache control no cache

⚡Cache-Control: s-maxage

Difficulty: Advanced

Related: cache control proxy revalidate cache control public cache control stale if error cache control stale while revalidate

⚡Cache-Control: no-cache

Difficulty: Advanced

Related: cache control max age cache control must revalidate cache control no store cache control private

⚡Cache-Control: no-store

Difficulty: Advanced

Related: cache control must revalidate cache control no cache cache control private cache control proxy revalidate

⚡Cache-Control: must-revalidate

Difficulty: Advanced

Related: cache control immutable cache control max age cache control no cache cache control no store

⚡Cache-Control: proxy-revalidate

Difficulty: Advanced

Related: cache control no store cache control private cache control public cache control s maxage

⚡Cache-Control: stale-while-revalidate

Difficulty: Advanced

Related: cache control s maxage cache control stale if error cache key normalization cache ttl

⚡Cache-Control: stale-if-error

Difficulty: Advanced

Related: cache control public cache control s maxage cache control stale while revalidate cache key normalization

⚡Cache-Control: immutable

Difficulty: Advanced

Related: brotli compression cache control max age cache control must revalidate

⚡Cache Key Normalization

Difficulty: Advanced

Related: cache control stale if error cache control stale while revalidate cache ttl cdn edge caching

⚡Signed URLs

Difficulty: Advanced

Related: server push deprecated service worker caching site performance time to first byte

⚡Origin Shield

Difficulty: Advanced

Related: lazy hydration lcp page speed preconnect

⚡Purge Cache

Difficulty: Advanced

Related: preconnect preload renderblocking resources responsive images

⚡Etag Revalidation

Difficulty: Advanced

Related: defer vs async dns prefetch gzip compression heuristic caching

⚡Heuristic Caching

Difficulty: Advanced

Related: etag revalidation gzip compression http/2 http/3

⚡Vary: Accept-Encoding

Difficulty: Advanced

Related: tree shaking ttfb vary user agent

⚡Vary: User-Agent

Difficulty: Advanced

Related: ttfb vary accept encoding 301 redirect 302 redirect 404 error

⚡CDN Tiered Caching

Difficulty: Advanced

Related: cache ttl cdn edge caching client hints cls