What is KEI ( keyword effectiveness index ) in SEO
KEI is a term of Search Engine Optimization and stands for “keyword effectiveness index” or “keyword efficiency index”.
The KEI compares the number of searches for a keyword with the number of search results to pinpoint which keywords are most effective for your optimization.
Suppose the number of searches for a keyword is 486 per month(from Google adword keyword tools) and Google displays 214,234 results(just below the search box in Google) for that keyword. Then the ratio between the popularity and competitiveness for that keyword is 486 divided by 214,234. In this case, the KEI 0.002.
The higher the KEI, the more popular your keywords are, and the less competition they have. That means that you might have a better chance of getting to the top in search result.
Webmaster
http://unli.info