I have created a SharePoint 2013 team site; in the
document library I was not able to see the Popularity Trends option in the
ribbon interface as shown in the following figure.
This is because Reporting
feature was not activated
in the site collection level. Go to Site Settings, click on Site
under Site Collection Administration
section. Activate the Reporting
feature now you can be
able to see the Popularity Trends option in the document library interface.
to view larger image)