Pick Perspective Keywords by Using Important Keyword Metrics
With the Industrial Strength SEO keyword popularity research tool, you will have the most critical metrics for collecting a semantic core. You will find KEI (keyword effectiveness index), global/local monthly searches, search trends, and bid competition among them.
KEI - the keyword effectiveness index shows you the ratio of searches to competition;
Global/Local monthly searches - statistics for the number of searches done from anywhere in the world in any language (updated with each query);
Search trends - refers to the keyword research volume over the last 12 months;
Bid competition - use this to see how many advertisers are bidding for a particular keyword. Also included is a keyword placement tool.