How to check the Description of the Document Library

Method 1

For all SharePoint versions, if you go to Document library settings page and you will see the description over here.

1. Open any of site for any version of SharePoint

2. Click on any of List which you want to get description, Go to Library setting by clicking on Library tab bar

3. Here check it out the description for the same

Method 2

For SharePoint 2013 and SP online, you can see this, once you click on the document library, the description showed under the document library.