Plugins can consist entirely of a widget, or add lots of functionality including a widget. Plugins are the way we extend our WordPress sites, and widgets give us a way to display special content outside of posts and pages. A common plugin is the social media plug where you can instantly share a post via most social media websites. This is a great way to advertise a post and your website if viewers are sharing posts they enjoy. 

To add a plugin onto your website you need to select the relevant plugin, I chose the social media plugin. Then you have to select what icon/button you want to be seen.

I then decided I only wanted the share plugins on my posts and not on my main pages.

This is what the bottom of the page looks like on each page.