Google ads can get expensive if they're not set up carefully. One way to make them cheaper is to use more specific keywords instead of broad ones. For example, instead of using "shoes," you can try "comfortable walking shoes for men." This targets people who know what they want and often costs less per click. Also, set a daily budget and test different ad versions to see which one performs better. You can pause the ones that don't bring results. Another tip is to schedule your ads to show only when your audience is active. Small changes like these can reduce your spending while keeping your ads effective.