There are quite a few complex algorithms used in search engines that make sure people get the most relevant results against their searches based on their location and other details. Using SEM strategies, businesses can appear on top of the search results with both SEO techniques and paid advertisements. Consider the case of a buyer searching online for some specific product. They would open a search engine and enter the product’s name. The results they see include various ads and websites from different businesses that sell those products. The purpose of search engine marketing is to ensure that your product appears among those search results when someone searches for it online.