You’ll be happy to hear that understanding exactly what WordPress plugins are — and what they do — isn’t too difficult. The official WordPress Codex explains it like this:
Plugins are ways to extend and add to the functionality that already exists in WordPress.
Let’s delve a little deeper in order to further clarify the matter…
WordPress is a great platform that comes with all the basics for building a functional site, and by using WordPress in its default state, you can easily manage the basics needed to create — and display — content.