A WordPress plugin is a small piece of code, or several pieces of code, that is added into your WordPress set up and increases the functionality of your website in some way. (Translation: Plug-ins allow your blog to have more features which allows it to do more than it could when you first installed it.) Most plug-ins are coded in the PHP scripting language and add another feature or function to your website.
Plug-ins integrate seamlessly with WordPress so there is no messing with your WordPress code. That’s another great advantage …