Keyword Efficiency Index

The Keyword Efficiency Index (KEI) is a key figure from search engine marketing , in particular from the area of search engine optimization (SEO). The KEI is a criterion that reflects the efficiency of keywords .

Importance and calculation

The aim of the KEI is to identify key words with an ideal relationship between competition and the number of search queries in search engines . Ideal here refers to the visibility on the first positions within the search engine result lists.

The KEI is calculated from the number of search requests for a keyword in a certain period (A) and the number of search results (E):

${\displaystyle KEI={\frac {A^{2}}{E}}}$

The higher the KEI, the more favorable the probability of an ideal position.