Server Side Includes (SSI) is a popular server-side scripting language, employed to add the content of one file inside of a second file. It's employed mostly with online content and it can help to make a static HTML site a lot more dynamic. If you'd like to have a daily quote shown on numerous web pages on your website, as an example, you can create a text file and replace the quote within it each day. All pages in which this file is included are going to display the modified quote, so you'll not have to alter all of them personally each time. SSI can also be used to incorporate the output of basic functions as opposed to a static file - for example, the client's IP address, a hit counter or maybe the present time and date. In this way, you can make your site appear a lot more professional and much more attractive to the visitors. Pages that implement SSI use a .shtml extension.