Why is creating three or more Search Ads per ad group a best practice?

Having more ads in an ad group allows Google to serve the best-performing ad for each specific auction.
Having more ads in an ad group means lower bounce rates for landing pages.
Having more ads in an ad group means the ads will receive a higher-quality score.
Having more ads in an ad group increases the chances of showing more than one ad per auction.

The correct answer is:

Having more ads in an ad group allows Google to serve the best-performing ad for each specific auction.

Sources: Google Ads Search Certification Course

To see all the questions and correct answers of the Google Ads Search Certification Exam, Click Here – Google Ads Search Certification Answers.