This has been an underutilized aspect of the GMB profile that Google is actively phasing out.
Most people who view a Google business profile are more likely to leave a review but very few will ask questions. If customers were actively asking questions, business owners would be all over this section.
While this feature was still active it presented business owners with the opportunity to seed their Q&A section with the most frequently asked questions and answer them.
Go to your Google Business profile and click the Q&A option. Here you can ask questions and post responses to your most frequently asked questions.

Any information you include in your Google Business Profile is used by the algorithm to match your business up with relevant keywords. The questions and answers in your profile can qualify you for additional search results.