Searching and Sorting: Most Popular
Last updated:
10:07pm Sep 30, 2017

In our Search results,  you have various sort options above the list.  One of them is 'Most Popular'.  That sort option is based on a system maintained metric called Radioactivity.

Let's view a YouTube Video as an Introduction to Drupal 7 and the Radioactiivity Module

So, what we've learned is that the Radioactivity score of a page is increased by every page view.  Over time the score will slowly decrease.  If folks stop looking at a page,  it will fall lower and lower in the list of popular pages.