Thread: Kei

KEI stand for Keyword Effectiveness Index, which measures how effective a keyword, is for your web site. It compares the number of search for a keyword with the number of search results to identify which keywords are the most effective for your campaign.

KEI (keyword effectiveness index) is one of the quickest ways to find keywords that show potential - that is, those keywords which are likely to help your site attract more traffic. It looks a bit like this: It's a scaled metric, so you'll never see a KEI of more than 100.
It is a frequently used term by Search Engine Optimization companies and stands for “keyword effectiveness index” or “keyword efficiency index”.