Target frequency in Google Ads refers to the number of times your ad is shown to a user within a given time frame. This feature allows you to control the frequency at which your ad appears to a user. For instance, if you set a target frequency of 3 impressions per day, your ad will be shown to a user no more than three times in a day. This feature is particularly useful for preventing ad fatigue, which can occur when a user sees the same ad repeatedly. By setting a target frequency, you can ensure that your ad is shown to a user just enough times to make an impact without becoming annoying or repetitive. It's important to note that target frequency is just one of many factors that can impact the performance of your Google Ads campaign, so it's important to work with an experienced SEO copywriter who can help you optimize your ads for maximum effectiveness.