Removing ad groups that are not performing well can actually improve how your whole campaign runs. Google Ads uses a quality score system, which is basically how Google rates your ads based on how relevant and useful they are. When weak ad groups drag down this score, your good ads also suffer. Cleaning out the dead weight helps Google focus budget on what actually works. It is a bit like pruning a plant so the healthy parts grow better. Have you ever seen a campaign improve after cutting underperforming ad groups?