What does the concept rank indicate in keyword expansion?

In the context of keyword expansion, the concept of rank primarily refers to the relevance and importance of keywords in search queries and results. While the choice regarding the distance between two words seems plausible, it does not accurately capture the essence of how rank functions within keyword expansion.

The rank of a keyword reflects its significance in relation to the content and the search intent. It evaluates how closely aligned the keyword is to the query in question and looks at its history of performance in generating relevant results. This ranking is influenced by various factors, including how often the keyword leads to valuable interactions (clicks, conversions, etc.) and how well it corresponds to the content's context.

The correct understanding of rank is crucial for optimizing searches and refining the keyword selection process, ensuring that keywords that add the most value are prioritized. In contrast, percentage of relevance, total number of relevant documents, and coherence of terms focus on different aspects of the data and search result effectiveness, which do not directly define the concept of rank in this specific context.