Definition: KEI is a number with two to four (and sometimes more) decimal places. Words that are rarely used in search will have a very small KEI (near 0) and keywords and phrases that are extremely competitive will also have a very low KEI. The higher the KEI the more likely it is that you can achieve top rankings for the keyword or phrase and it will be worth your while because enough searches are conducted to warrant giving the keyword some attention.
Also Known As: Keyword Effectiveness Indicator, Keyword Efficiency Index
Examples:
Focusing on keywords that have a high KEI means a greater likelihood of high placement in the search engine results for that keyword or keyword phrase.
