I use Google for a lot of searching every day, I am sure more than 95% of casual users. I am not talking about checking ranking, as things like that can be automated with Google’s APis and various tools. When I need to find information, I use Google Search.
I have seen Google suggest other related terms to try such as this, which appears at the bottom of a page when I search for “insurance”.
The Google Related terms normally look something like this:-