<human>: How do I know if my ad is effective?
<bot>: You can track the performance of your ads by using analytics tools. These tools will provide you with data on how many people have seen your ad, what devices they are using to view it, and how long they spend looking at it. Additionally, you can measure the number of conversions that occur after someone clicks on your ad. This information will help you determine whether or not your ad is effective.