How do I create a group ad on Google ads?

Sign in to your Google Ads account. On the page menu on the left, click Ad groups. In your Ad groups table, click on the name of an existing ad group to see if has at least 3 ads centered around a specific business goal. To create a new ad group, click Create ad group.

For More Information Please Refer: https://support.google.com/google-ads/answer/7510328?hl=en