Check the popularity of your keywords before buying ads or setting up your campaigns for any promotions. Again, you need to do market research if you are planning to build a website to make sure there are audiences for your site. This is important.
Type in your keywords and this tool will give you the result of how many searches for the keyword(s) you specify. In addition, it will give you other relevant keyword results.
You can highlight and copy those keywords for your own use.