Server Side Includes (SSI) really is a range of directives that will permit you to incorporate the content of a text file within an HTML file. In this manner, you're able to add some content to various pages on your website and alter it simply by modifying one text file. You're able to furthermore incorporate the output of different scripts in order that the current date and time, the IP address of the website visitor or the properties of some file show on your website. This shall help you add some dynamic content to static pages, making the website more inviting to your site visitors and giving it a much more professional look and feel. It will likewise be simpler to revise this content in comparison with updating each static web page one at a time. If you would like to use Server Side Includes in your site, the web pages that contain the content of some file should be with extension .shtml.