What is an ad group Google ads?

An ad group contains one or more ads that share similar targets. You set a bid, or price, to be used when an ad group’s keywords trigger an ad to appear. This is called a cost-per-click (CPC) bid. You can also set prices for individual keywords within the ad group.

For More Information Please Refer: https://support.google.com/google-ads/answer/2375404?hl=en