A SharePoint list is a collection of information or items. Rows and columns are used to store data. Microsoft Excel is very similar. Additional properties, or meta data, can be configured and associated with list items.
Creating a List
To create or add a List to your site, first navigate to the Settings-Gear and click the Site Contents menu option.
Your screen will change to show the site's contents. Left-click the plus sign ("+") near the top-left to show the New menu options. Select the List option. You can choose between starting out with a Blank List, or a List based on a preexisting List. In this instance, select the Blank List option.
You will then be prompted to enter the name of the new List, as well as whether you want the List to show up in the site navigation. To be consistent with how your site has been created, uncheck the "Show in site navigation" checkbox.