Online advertising that is triggered when users perform searches using keywords that a company has purchased. Ads look like organic search results, but they appear more prominently on a search engine results page (SERP) than they would have organically. They are also labeled as “ad” or with another word indicating “paid.” You’ll often see paid search in crowded categories such as airline flights, hotels, and laptops. The pricing model is usually pay-per-click (PPC).