Bengaluru and Erode, India — working with clients in other time zones

SEO Algorithms & Updates

An SEO glossary of terms every marketer should know in 2026

A practical, current glossary covering the essential SEO terminology every marketer should be comfortable with, from foundational concepts to 2026-specific terms.

Search data reviewed on a laptop

SEO terminology accumulates quickly, and staying comfortable with current vocabulary — including newer terms specific to the AI search era — helps both practitioners and the broader marketing teams they work alongside communicate clearly about strategy and results.

Foundational terms

  • SERP: Search Engine Results Page, the page shown after a search query.
  • E-E-A-T: Experience, Expertise, Authoritativeness, Trustworthiness — Google's content quality framework.
  • Core Web Vitals: Google's page experience metrics (LCP, INP, CLS).
  • Canonical tag: an HTML element indicating the preferred version of a page among duplicates.
  • Backlink: a link from another website pointing to yours.

Technical terms

  • Crawl budget: the amount of crawling activity Google allocates to your site.
  • hreflang: an attribute signalling language and regional targeting for a page.
  • Structured data / schema markup: standardised code giving search engines explicit facts about page content.
  • SSR (server-side rendering): generating page HTML on the server before it reaches the browser.

A shared, accurate vocabulary between SEO specialists and the broader marketing and leadership team removes a surprising amount of friction from strategy conversations that otherwise get bogged down in basic terminology confusion.

AI search and AEO/GEO terms specific to 2026

  • AEO (Answer Engine Optimization): optimising for visibility in AI-powered answer engines.
  • GEO (Generative Engine Optimization): structuring content for accurate retrieval and citation by generative AI systems.
  • AI Overview: Google's AI-generated summary feature appearing above traditional search results.
  • llms.txt: an emerging file standard signalling content permissions to AI crawlers.
  • Zero-click search: a search resolved directly on the results page without a click to any external site.

Strategic and measurement terms

  • YMYL (Your Money or Your Life): content categories subject to stricter quality evaluation.
  • Topic cluster: a content structure organising a pillar page with related, interlinked subordinate pages.
  • Cannibalisation: when multiple of your own pages compete for the same search intent.

Frequently asked questions

Is this glossary comprehensive?

It covers the terms most relevant to current SEO strategy and this specific content series — the full breadth of SEO terminology extends considerably further, and new terms continue to emerge, particularly around AI search.

Do AEO and GEO terms differ meaningfully from each other?

They overlap substantially in practice, as covered in our AEO vs GEO vs SEO explainer — the distinction is subtle enough that many practitioners use the terms somewhat interchangeably.

Should marketing team members outside the SEO specialty learn this vocabulary?

Yes, a working familiarity helps non-specialist stakeholders engage meaningfully with SEO strategy and reporting, rather than relying entirely on a specialist to translate every concept in every conversation.

If your team wants a working session to build shared SEO literacy, talk to our team.

The takeaway

Bookmark this glossary and refer back to it whenever unfamiliar SEO terminology comes up in a meeting or report — a shared, accurate vocabulary is one of the simplest ways to improve how a team collaborates on SEO decisions.


Written by Fibvo — Bengaluru and Erode, India — working with clients in other time zones. Questions, or think we have it wrong? Tell us.

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