SEO and growth glossary
H Terms and Definitions
62 plain-English definitions begin with H. Showing page 2 of 2.
H definitions, page 2
- Hreflang return tag
- An hreflang annotation on a target page that points back to the originating alternate.
- Hreflang tag
- An HTML link tag specifying language and regional targeting for an alternate URL.
- HSTS
- HTTP Strict Transport Security, a header instructing browsers to only access a site over HTTPS.
- HTML attribute
- A name-value pair on an HTML element that modifies its behavior or metadata.
- HTML element
- A unit of HTML defined by tags, with optional attributes and content.
- HTML sitemap
- A user-facing page that lists site URLs for navigation and discovery.
- HTML5
- The fifth major revision of HTML, including semantic elements and modern multimedia support.
- HTTP
- HyperText Transfer Protocol, the application protocol used for web communication.
- HTTP request
- A message from a client to a server requesting a resource.
- HTTP response
- A message from a server to a client returning a resource or status.
- HTTP status code
- A three-digit code in an HTTP response indicating the outcome of a request.
- HTTP/2
- A major revision of HTTP introducing multiplexing, header compression, and server push.
- HTTP/3
- A revision of HTTP built on QUIC, providing improved performance over unreliable networks.
- HTTPS
- HTTP transmitted over TLS, providing encrypted communication between client and server.
- HTTPS migration
- The process of moving a site from HTTP to HTTPS while preserving SEO equity.
- Hub and spoke model
- A topical strategy with a central pillar page linked to many supporting cluster pages.
- Hub page
- A page that aggregates and links to related content on a topic.
- Human translation
- Translation produced by a human translator, contrasted with machine translation.
- Hummingbird
- A 2013 Google overhaul of its core ranking algorithm focused on conversational query understanding.
- Hydration
- The process of attaching JavaScript behavior to server-rendered HTML in the browser.
- Hyperlink
- A reference to another resource, navigable by clicking, typically marked up with the anchor element.
- Hyperlocal SEO
- Local SEO targeted at a very small geographic area such as a single neighborhood.