This usually happens when the daily budget is too low for the competition or when bidding is set too aggressively. One fix is to switch your ad delivery to "standard" instead of "accelerated," which spreads your budget more evenly across the day. You can also set bid caps to avoid paying too much per click. Adjusting your ad schedule to focus on peak hours helps too, so you are not burning budget during low-traffic periods. Have you run into this problem before, and what worked for you?