SEM ads typically appear at the top and bottom of search engine results pages (SERPs). These ads are marked with an “Ad” label to distinguish them from organic search results. Depending on the search engine and the user’s device, SEM ads can appear on partner websites as display advertisements or within shopping ad placements on e-commerce platforms. The visibility of these ads is based on a combination of factors, including the relevance of the ad to the user’s search query, the amount the advertiser is willing to pay per click, and the quality of the ad itself.