Source context is what kind of source your website is, and therefore which topics it is entitled to be an authority on and from which angle. A bank and a personal-finance blog can both write about mortgages, but they are different sources and should cover the subject differently. Getting source context right decides what belongs in your topical map and, just as importantly, what doesn’t.
Why source context matters
Search engines don’t evaluate a page in isolation. They ask what the site behind it is, and whether that site is a reasonable source for the query. A clear source context helps in three ways:
- It sets the border of your topical map. Without it, maps sprawl into every adjacent topic and coverage gets thin everywhere.
- It shapes the angle of every page. The same entity gets different attributes emphasised depending on who is writing. A lender’s mortgage page leads with rates and eligibility; a blog’s leads with how to compare lenders.
- It concentrates authority. Every page that fits reinforces what the site is about. Every page that doesn’t dilutes it.
Same topic, different source contexts
| Topic | Source context | What it should emphasise |
|---|---|---|
| Running shoes | Shoe retailer | Models, sizing, fit, returns, comparisons that lead to purchase |
| Running shoes | Physiotherapy clinic | Injury prevention, gait, when shoes matter and when they don’t |
| Semantic SEO | Practitioner consultancy (this site) | Methods, frameworks, tools, case studies, services |
| Semantic SEO | Search news publisher | Updates, announcements, industry reactions |
None of these is better than the others. Problems start when a site tries to be all of them at once.
Source context, central entity and central search intent
These three terms from Koray Tuğberk GÜBÜR’s framework work together at different scales:
- Source context: what the whole site is. Site level.
- Central entity: the one subject the site exists to be the reference for. Site level, within the source context.
- Central search intent: the one job a specific page does. Page level, within both.
The last two are covered in central entity and central search intent explained. Source context comes first, because it constrains both.
How to declare your source context
You can’t tell Google your source context with a tag. It is inferred from consistent signals across the site:
- Write it in one sentence for yourself: “A [type of source] that helps [audience] with [subject] by [how].” Ayonchy’s is roughly: a practitioner site that teaches and implements semantic SEO and topical authority.
- Say it on the homepage and About page, in plain words, with the same description you use on LinkedIn, directories and review sites. That is your entity home.
- Match the navigation. Menus should reflect the topics in your source context, not every page you have ever published.
- Match the commercial offer. Services and products should sit inside the same subject as the content. A clear link between what you teach and what you sell is a strong signal.
- Show real authors with experience relevant to the source context.
- Publish inside the border. Every new page should pass the test: does this fit what we are?
What contradicts source context
- Trending posts outside your subject published for quick traffic.
- Service pages for unrelated offers, such as social ad boosting on a technical SEO consultancy.
- Old experiments left live, such as template pages, test tools and one-off tutorials.
- Inconsistent descriptions of the business across the web.
We applied this to ayonchy.com in October 2026: posts on an Amazon login error and on ChatGPT’s water use were good traffic once but had nothing to do with semantic SEO. They were unpublished and redirected to the closest relevant pages, along with a handful of other pages that no longer fit, so the site’s topical signal stays clean.
Should you remove off-context content?
Usually, yes, but carefully. Check each page for traffic, backlinks and conversions first. Pages with real value can sometimes be reframed to fit the source context. Pages without value are better unpublished and redirected to the closest relevant page, so any links they earned still count. A full decision process will follow in our guide to content pruning.
A quick source context audit
- Can you state what the site is in one sentence?
- Does the homepage say the same thing?
- Do 90% or more of your indexed pages fit that sentence?
- Does your main menu reflect it?
- Do your LinkedIn, Google Business Profile and directory listings describe you the same way?
- Do your services sit inside the same subject?
Any “no” is the first thing to fix before publishing more. Then move on to building the topical map and the six-phase sequence in how to get topical authority.
Frequently asked questions
What is source context in SEO?
Source context is what type of source a website is, and therefore which topics it can credibly be an authority on and from what angle. It is inferred from the site’s content, navigation, offer and how it is described across the web.
How is source context different from central entity?
Source context describes what kind of site you are. The central entity is the main subject you cover within that context. Source context comes first and constrains the central entity.
Can off-topic content hurt my SEO?
It can dilute what search engines understand your site to be about. Pages outside your source context rarely build authority and can weaken the signal from the pages that fit.
How do I tell Google my source context?
There is no tag for it. Make the homepage, About page, navigation, services, authors and external profiles all describe the same thing, and publish only within that subject.