Server Side Includes (SSI) is a popular server-side scripting language, that is employed to incorporate the content of one file inside of another file. It is employed mainly with online content and it will make a static HTML site more dynamic. If you'd like to have a daily quote displayed on many web pages within your site, as an example, you can make a text file and replace the quote inside it daily. All of the webpages where this file is incorporated are going to show the modified quote, so you'll not need to alter them manually every single time. SSI could also be used to contain the output of simple functions instead of a static file - for instance, the viewer's IP address, a hit counter or maybe the present date and time. In this manner, you can make your internet site seem more professional and more attractive to the visitors. Web pages that use SSI get a .shtml extension.