To lower CPC on push ads without reducing quality, start by improving your ad's relevance. A good headline and image can bring a higher CTR, which helps lower the cost. If the ad gets more clicks, the network sees it as useful and rewards it with cheaper traffic. Also, test different creatives to find which one brings more attention. Use blacklists to cut out bad placements and focus on zones that convert. Targeting the right device types, OS versions, and user interests can also help keep CPC low. You don't always need to go broad to get good results. Sometimes narrowing the audience a little can make a big difference. Try running campaigns during hours when users are more active, and monitor your bids often. Running a smart campaign means spending less while still keeping the quality high. Have you noticed what kind of changes bring the biggest drop in CPC?