What Is Keyword Clustering?
Keyword clustering is an advanced SEO strategy to make your pillar pages (primary page) rank for more keywords instead of a single keyword by strengthening the pillar pages with supported blog content through internal linking.
Keyword Clustering is a process that involves keyword research to find the complete list of long-tail keywords, subtopics, questions asked around your pillar page or topic.
Then these are collected, topics, keywords are grouped based on their relevance called keyword clustering.
Blog posts that target long-tail keywords are built out of these created clusters.
These blog posts should interlink to their appropriate pillar(primary) page to improve the content authority of these pillar pages and support them in ranking for the higher search volume keywords.
Quick Guide to Keyword Proximity and how it influences SEO