What is semantic SEO? Entities, context and topical authority
By Anis Harbaoui, SEO specialist
Semantic SEO is the practice of optimizing content for meaning rather than for individual keywords: covering the entities, attributes and questions that make up a topic, and connecting them so search engines recognise your site as an authority. It reflects how modern search works: Google matches concepts and relationships, not strings.
- Search engines model the web as entities (things) and relationships, not keywords.
- Topical authority comes from covering a topic completely and linking the pieces logically.
- Each page should answer one intent fully; the site as a whole should cover the topic.
- Structured data and internal links make the semantic structure explicit.
From keywords to entities
Since the Knowledge Graph launched in 2012 and with later systems such as BERT and MUM, Google has moved from matching words to understanding things. An entity is a uniquely identifiable thing, such as WordPress, a company or a concept like schema markup, with attributes (WordPress is written in PHP) and relationships (a plugin runs on WordPress). Semantic SEO organizes content around those entities so that both people and machines understand it without guessing.
Semantic SEO vs traditional keyword SEO
| Aspect | Keyword SEO | Semantic SEO |
|---|---|---|
| Unit of work | One keyword per page | One intent per page, one topic per site section |
| Content scope | Repeat the target phrase | Cover entities, attributes and related questions |
| Success signal | Rank for a phrase | Rank for the whole cluster of related queries |
| Internal links | Exact-match anchors | Contextual links between related entities |
| Structured data | Optional | Makes entities and relationships explicit |
The core concepts
Topical map
A plan of every page needed to cover a topic, organised from a central entity (the core) to its attributes (sub-topics) and peripheral questions (outer topics). Our guides hub is built this way.
Source context
The angle that makes a site’s perspective unique. For NexalSEO, it is “the plugin company that makes WordPress sites understandable through entities”. Every page should fit that angle.
Information gain
The new information a page adds compared with what already ranks: original data, a clearer method, a worked example. Pages that only restate the consensus have little reason to be ranked above it.
Contextual coverage
Answering the questions a reader naturally asks next, in the order they would ask them, inside one coherent page.
A practical semantic SEO checklist
Define the central entity
What the site is about, in one noun phrase.
List its attributes
Features, use cases, problems solved, integrations, comparisons.
Map one page per intent
Avoid two pages competing for the same question.
Open each page with a direct answer
A definition or answer in the first 40–60 words.
Link related pages contextually
Child pages link to their parent; siblings link when they share an entity. See internal linking.
Make entities explicit
Use schema with about, mentions and sameAs. See entity SEO explained.
Refresh and expand
Add pages as new questions appear; update facts that change.
Further reading: How Google Search works.
Frequently asked questions
Is semantic SEO different from topical authority?
Topical authority is the outcome; semantic SEO is the method of building content around entities and intents that produces it.
Do I still need keywords?
Yes, to understand how people phrase their questions. But a page is planned around an intent and its entities, not around a keyword density.
How long does topical authority take?
It depends on competition, but sites usually see clusters rank together only after most of a topic is covered and interlinked.
Related guides
Entity SEO with sameAs and Wikidata
Make your brand a known entity.
How Google understands a website
From crawl to Knowledge Graph.
Internal linking strategy explained
Connect the topical map.
NexalSEO builds its schema around entities, with Organization, Person and WebSite nodes linked to each other.
See all features