The keyword database in SEOprofiler contains keywords that are searched for on search engines, keywords that are entered in search toolbars, semantically related keywords, keywords that are suggested by auto-suggestion features, keywords that are related to the content on a web page, and much more.
We calculate the number of monthly searches based on a sample of all monthly searches.
That's because of the different sample that we use to calculate the search numbers. The main purpose of the keyword tool is to get new keyword ideas.
The search numbers are a bonus but you shouldn't focus too much on them. If a keyword is related to your business, you should use it on one of your web pages.
Of course, the search volume is important to find the most popular words. It's important to know, however, that all keyword tools do not show the actual number of monthly searches. This also applies to Google's own keyword tool. Google's keyword tool shows estimates of ad impressions, other keyword tools show the number of searches based on the sample that they can access.
Monthly search numbers can be used to judge the relative popularity of a keyword. Use them with a grain of salt. If a keyword is related to your business, you should use it on one of your web pages. A highly relevant keyword with few searches often has a higher conversion rate than a general keyword with many searches.