Broad match keywords, combined with Smart Bidding, uses the best of Google's AI to help reach searches that are relevant to your business and expected to perform within your goals. This helps you attract more visitors to your website, spend less time building keyword lists, and focus your spending on keywords that work. In this tutorial you'll learn how to add broad match keywords to your existing Search campaigns, capturing high-intent queries to increase your reach and coverage. https://support.google.com/google-ads/answer/2407779?hl=en#:~:text=Broad%20match%20is%20the%20default,build%20an%20extensive%20keyword%20list.
https://support.google.com/google-ads/answer/7478529?hl=en
https://support.google.com/google-ads/answer/12159290?hl=en