A bid amount that applies to all of the keywords and placements in your ad group that don't have individual bids. This bid sets the maximum amount that you're willing to pay for each click on your ad for any keyword and placement without its own bid.
- Your ad group default bids are used when there aren't more specific bids that apply. For example, if you set a different bid for one of your keywords, that bid will be used (instead of any ad group default bid) whenever that keyword triggers your ad to appear.
- Your default bids are displayed above the tabs on your ad group page in your account. If the Display Network bid is marked "Off", it means that you've opted out of the Display Network.