The idea behind a “plug-in” is adding an outside application to your site, in order to generate something that adds content to your site. We recommend adding something to help organize your content. However, feel free to use creative liberties in designating your plugin.
The list of plugins available for WordPress is available in the lefthand toolbar on the backend of the site.
Instructions on how to download a plugin: https://techdocs.blogs.brynmawr.edu/7260#wordpress-plugins
Some recommended plugins to play around with is MonsterInsights and Akismet Anti-Spam