Keyword effective indexing is a process of indexing the keyword according to how much they are effective to the reader or visitors. it is totally maintained by Google. thanks
The KEI of a keyword or search term is the equation that you end up with that will tell you how easy a particular keyword is to rank for. What this is supposed to do is highlight quite easily which search terms to target in order to drive traffic to your site.
Its Totally depends by Google and other main factor are importance to its like Title,H1,H2 ........Tag.
KEI is the ratio of searches for a keyword to the competition for that keyword i. e. KEI={(Keyword search volume)x(Keyword search volume)}/(competition for the keyword) Search volume for a keyword could be find through Google adwords keyword tool and competition is the number of sites in competition. KEI is used to measure how easy/tough it would be to rank for a particular keyword. The keyword that has good searches and low competition has a good KEI and easy to rank.
KEI is a statistical formulation that reveals the most effective keyword phrases and terms to use in optimizing your web pages for. KEI={(Keyword search volume)x(Keyword search volume)}/(competition for the keyword) According to KEI the best keywords are those that have higher searches and that don't have much competition.
Is there any particular value range? Like we maintain a particular percentage range for keyword density in site content.
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 website.
I have seen many Formula's Online the basic formula i found was Total Number Of Searches for a keyword X Total Number Of Search Results for that keyword and also i have seen people who follow Wordtracker using this formula Number Of Searches^2 X Total Number of Search Results are there any specific formulas that are define different for Adword tool or Keyword Tracker tool ?