Google has moved beyond keywords to "Entities" and "Topics." To rank today, you cannot just write one blog post; you must build a library of knowledge. This is the Topic Cluster model.
The Hub and Spoke Model
- Pillar Page (The Hub): A broad, comprehensive guide on a high-volume keyword (e.g., "SEO Guide").
- Cluster Content (The Spokes): Specific articles answering detailed questions (e.g., "How to do keyword research").
- Internal Linking: The secret sauce. Every spoke must link back to the Pillar with descriptive anchor text.
This signals to Google that you are an expert on the entire topic, not just one keyword. (See: Internal Linking Guide).
Visualizing Your Authority
Zyro's Content Strategy Center generates a "Topical Authority Map," visualizing where you have gaps in your clusters compared to competitors.