Most sites have a tabber area that allows you to navigate to either popular, recent, or archived posts in just one click. In WordPress, this is called the JQuery Tabber Widget. This widget allows you to save space by combining multiple widgets into one.
JQuery Tabber Widget is an important feature to have in your site because as your site grows, you might feel that you don’t have enough room in your sidebar to showcase your content. This widget will let you add anything you like. It can be your most popular post, a monthly archive, most recent, or anything that you think can benefit your site.
Read the rest of the tutorial here: http://www.wpbeginner.com/wp-tutorials/how-to-add-jquery-tabber-widget-in-wordpress/