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PositiveBacklink
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Niche Relevance Score

Compare any two websites and get an instant topical relevance score. Critical before any link exchange, guest post, or paid placement.

Demo mode — sign up for live API data

Why niche relevance is the #1 signal in modern link building

Google's 2022 Helpful Content Update and the 2024 March Core Update both elevated topical authority as the dominant ranking signal. A backlink from a site in your exact niche is worth more than 10 backlinks from unrelated high-DR sites — because Google trusts contextually relevant signals over raw authority.

This was confirmed in the leaked 2024 Google Search ranking documents (the Content Warehouse API leak), which revealed signals like siteFocusScore and topicalAuthorityBoost as core inputs to the ranking algorithm.

How the relevance score is calculated

Our scoring model combines four dimensions to produce a 0-100 score:

1. Lexical overlap (30%)

Compares the top 50 noun phrases on each site's homepage and recent posts. High overlap means both sites talk about the same topics in similar language.

2. Semantic similarity (40%)

Uses sentence-embedding models to measure conceptual similarity even when wording differs. Two sites can talk about "running shoes" and "trail footwear" — different words, same niche.

3. SERP co-occurrence (20%)

Counts how often both sites rank for the same search queries. Sites competing for similar keywords are almost always topically aligned.

4. Audience match (10%)

Estimates audience overlap via referring domains and outbound link patterns. Sites linked from the same sources tend to serve the same audience.

What relevance score is good enough?

Frequently asked questions

Is the score in this demo accurate?

The free demo uses a deterministic scoring model based on domain and TLD heuristics. Sign up for a free PositiveBacklink account to get live API-powered scores that actually crawl the sites and apply the four-dimension model.

Does relevance matter more than DR?

Yes, in most cases. A DR 30 site in your exact niche outperforms a DR 70 site in an unrelated niche for organic ranking lift. Authority still matters — but only inside topical proximity.

Can two unrelated high-DR sites ever exchange safely?

Through editorial guest posts on relevant subtopics, yes. Direct homepage-to-homepage exchanges between unrelated niches are nearly always footprint risks. Use the ABC Triangular method instead.

Want every exchange auto-filtered by niche relevance?

PositiveBacklink runs the full four-dimension relevance model on every potential match. You only ever see partners scoring above your minimum threshold — zero off-topic suggestions.

Start matching with relevant sites

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