Keyword position checkers give you an idea, where your website is ranking for a specific keyword in Google search engine. You can select the specific range and can place multiple keywords. So the tool will search in the Google search engine and will give you a position. Where your website is ranking in Google
You have to provide the domain name of your website and list of keywords for which you want to search position in search engine and choose the Google to search engine and also provide position such as top 100 then the tool will only check whether your keyword in that specific search engine ranking in top 100 or not.