What are broad match keywords?

Broad match: Definition. A keyword option that allows your ad to show when someone searches for that keyword, variations of it, as well as other related topics. … For example, when you add “hats” as a broad match keyword, you tell Google Ads to try to show your ad for searches containing that term or a similar one.

For More Information Please Refer: https://support.google.com/google-ads/answer/2407779?hl=en