Density

Density refers to how often keywords and phrases appear throughout your content, typically measured as a percentage of total words. This metric has a small effect on SEO and can be modified by long or short text length. It commonly works well between 0 and 2% with around 4% as an upper limit. Beyond 4%, content often feels stuffed with repetitive words that hurt readability.

Nowadays, Semantic Keywords go further to point to page relevance than simple keyword density. Density does not promote rank directly, but does make it clear to humans if content is pleasant to read or not. There is no 1:1 connection between density and Ranking and SERP performance, making it more of a content quality signal.

Good density optimization focuses on natural keyword usage that supports Topical Relevance without hurting readability. Smart Content Strategy balances keyword density with Prominence and semantic variety. This ensures content feels natural while clearly communicating your main topics to both search engines and users.