There is a good way to tell you what are the exact keywords are being searched in the search engine by internet users around the world.

You can install any keywords software to tell you what are the most frequent words that a user typed. Software will categorise the search into more specific categorise and rank them base on the count of search. From the search you are able to tell a specific subject and also the related subject of a product.

For example, if you are a great gym goer and you want to know what are the rest of the world are searching to this keyword in the internet. You will know that with certainty that there are similar things that people like to search with the same passion and interest of gym lovers.  You will know what are the majority of the gym lovers around the world are seeking.

This will comfirm with certainty that actual data will show and you dont have to guess on your own.