Search engines need no definition whatsoever, simply because of the immense popularity, they enjoy in today’s world. They’re online tools used to search for all sorts of information on the internet. Some of the frontrunners of this service are Google, Yahoo! and Bing. In order to appear in a search engine’s search results, you can follow any one of two ways. Either you can appear as a natural or organic listing, which is not influenced by anything else but simply the search engine’s own formula for fetching search results, or you can choose to appear as a paid listing, which as the suggests, are influenced by some payment you need to make to the search engine. Search Engine Optimization is a widely popular method of ensuring your content stays on top of search engine results. Paid listings typically appear above or beside organic listings in search results as advertisements while Pay per Click happens to be the most commonly seen cost for advertising.