Search Volume
Search volume is the average number of times a keyword is searched per month in a given search engine and country. It estimates how much demand a query has and helps you prioritise which keywords are worth targeting.
How search volume is measured
Volume is usually an average of monthly searches over the past year, which smooths out week-to-week noise. It is an estimate, not an exact count, and the same keyword can have very different volume in different countries and languages.
How to use it
Compare search volume against intent and competition. High-volume head terms bring traffic but are hard to rank for; lower-volume long-tail keywords often convert better and are easier to win. Volume tells you the size of the prize, not how hard it is to claim.
Search volume at Kwinside
The Kwinside keyword API returns a search-volume figure for every keyword it suggests, across six languages, so you can size demand programmatically.