The "Vector Density" Rule: Why Niche Sites Crush Generalist Sites in AI Search.

AI GEO Lab
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The "Vector Density" Rule: Why Niche Sites Crush Generalist Sites in AI Search.

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⚡ Key Takeaways:

  • The Physics: AI models map your website as a "Cluster of Vectors" (Concepts) in 3D space.

  • The Metric: "Semantic Distance." If your articles are too far apart conceptually, your Authority Score drops to zero.

  • The Fix: You must tighten your "Topic Radius." Don't write about AI; write about AI Search.

We have reached a critical point in the Infomly Lab.
We have 12 solid posts.
The temptation now is to "expand." To start writing about AI Art, Coding Tools, or Tech News.

But the math of Generative Engine Optimization (GEO) tells us to do the opposite.
It tells us to Narrow Down.

To understand why, you need to understand how Gemini "sees" a website. It doesn't see a list of blog posts. It sees a Vector Cloud.

The Science: How AI Maps Authority

Imagine a 3D room.
Every concept in the universe has a coordinate (X, Y, Z).

  • "Apple" is close to "Fruit."

  • "Apple" is also close to "iPhone."

  • "Fruit" is very far from "iPhone."

When Google crawls your site, it plots every article you have written into this 3D space.

The "Generalist" Disaster:
If you write about SEO on Monday, Protein Powder on Tuesday, and Politics on Wednesday, your Vector Cloud looks like a scattered mist.

  • Density: Low.

  • AI Confidence: Zero.

  • Result: The AI doesn't know what you are an expert in, so it ignores you for everything.

The "Specialist" Fortress:
If you write about SEO, GEO, Navboost, and Keywords, all your points land in the same tight corner of the 3D room.

  • Density: Extremely High.

  • AI Confidence: 100%.

  • Result: You create a "Gravitational Pull." When a user asks about that specific topic, the AI is mathematically forced to cite you because your density is higher than Wikipedia's.

The "Topic Radius" Experiment

I ran a test to see how "wide" I could go before my rankings dropped.

Phase 1: The Tight Core
I wrote 5 articles strictly about "AI Search."

  • Result: I started ranking for long-tail keywords like "How to rank in Perplexity."

Phase 2: The Expansion (The Mistake)
I wrote 5 articles about "AI Image Generators" (Midjourney).

  • Result: My rankings for "AI Search" dropped.

Why?
Because "Image Generation" and "Search Algorithms" are semantically distant. By widening my focus, I diluted my Vector Density. I became "Kind of an expert in AI," rather than "The World Expert in GEO."

The Protocol: "Stay in the Circle"

To hit $10,000/month, you don't need to be famous. You need to be Dense.

Here is the rule I follow for Infomly:
"The Semantic Bridge Rule."

Never write a new post unless it connects to a previous post via a shared entity.

  • Current Post: "Navboost" (Entities: Google, Ranking, User Signals).

  • Proposed Post: "Best Email Marketing Tools."

    • Shared Entities: None.

    • Verdict: Reject. (This breaks the chain).

  • Proposed Post: "How User Signals affect AI Answers."

    • Shared Entities: User Signals, AI Answers.

    • Verdict: Publish. (This strengthens the chain).

Why This Beats "Search Engine Land"

Our competitor, Search Engine Land, is huge. They cover everything: PPC, Social Media, Amazon, Google, Bing.
Their Vector Cloud is massive, but it is Diffuse.

Infomly is small. But we only cover GEO.
Our Vector Cloud is a tiny, super-dense Black Hole.

In the specific region of "AI Search Strategy," our density is higher than theirs.
That is how David beats Goliath in the age of AI. David is sharper.

Final Verdict: Don't Be a "Jack of All Trades"

The "Creative Generalist" (from Post #7) is a mindset about skills (Coding + Design + Writing).
But your Content Strategy must be a Specialist.

Use your generalist skills to build a Specialist Fortress.
Keep the topics tight. Keep the links internal. Keep the density high.

Frequently Asked Questions (FAQ)

Can I ever expand my topics?
Yes, but only after you have "conquered" the current circle. Once you are #1 for GEO, you can slowly expand to "AI Marketing," then "Digital Marketing." This is the "Bowling Pin Strategy." Knock down one pin before aiming for the next.

How many posts do I need for Vector Density?
Data suggests that 20-30 tightly clustered posts are enough to establish "Topical Authority" in a micro-niche. 10 scattered posts are worthless.

Does this help with AdSense?
Yes. Advertisers pay more for "Focused Audiences." If your site is 100% about "B2B Search Strategy," the ads will be for high-ticket SEO software (

50RPM).Ifyoursiteisrandom,theadswillbeforgenericproducts(50RPM).Ifyoursiteisrandom,theadswillbeforgenericproducts(

2 RPM).

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