Customising meta descriptions are included in the featured listing only. The purpose of a meta description tag is to provide a brief and concise summary of your website's content. Search Engines often display meta description tags in the Search Engine Result Pages (SERPs). These descriptions provide an introduction to your web site that will likely determine whether a person decides to visit your page or bypass it. Therefore, the better your meta description tags are, the greater the likelihood that a person will actually click on your link and visit your website.