It's so popular it has become a verb: according to Webster's New Millenium Dictionary of English:
google (v) to search for information on the Internet, esp. using the Google search engine.
Google gets more search use than any other search engine and appearing on its first page is what it's all about in the world of Search Engine Optimization.
Finding the best keywords to incorporate into your page content or use within your site is no longer a mystery. Google provide a handy tool that searches its own database for any key word or phrases you enter.
Go to
https://adwords.google.com/select/KeywordToolExternal
and have a play. Not only will it give you more than enough information to digest it also gives you top tips for other keywords worth considering at the bottom of the page.