This is a typical problem with bid settings being too high. Your budget gets burned up in the first few hours of the day, so you miss all the searchers with demand in the remaining time slots. The solution is to use an intelligent bidding mechanism: a program monitors bidding results in real time and automatically adjusts your bids for each time period, so that your daily budget is distributed evenly throughout the day instead of being concentrated in peak hours. This not only extends your ad exposure time, but also reduces the overall cost per click with the same budget. Before setting a bid limit, it's recommended to first observe the competition level and average cost-per-click for your target keywords, then decide on a reasonable daily budget allocation strategy.