A plugin is a piece of software containing a group of functions that can be added to a WordPress site.
http://gregorynkzx515.institutoalvorada.org/a-plugin-is-a-piece-of-software-application-containing-a-group-of-functions-that-can-be-contributed-to-a-wordpress-website
A plugin is a piece of software application containing a group of functions that can be added to a WordPress site.