WordPress Plugins are a piece of code that contains one or more functions written to extend and add to the functionality of an existing WordPress website.
The core of WordPress is designed to be lean and lightweight, to maximize flexibility and minimize code bloat. Plugins then offer custom functions and features so that each user can tailor their site to their specific needs.
Below is the list of plugins that comes with WordPress installation.
What is a plugin in WordPress? List plugin that comes with WordPress