Ranking a page or portlet could be used to measure popularity. Fortunately, the portal provides a page-rating portlet, and this can be added to any page. In addition, adding ranking to a portlet can be done with the tag
liferay-ui:rating, as the portal provides a way of extending portlet capabilities via the UI tags.
Adding comments on a page or an asset could be useful too. The portal provides a page comments portlet, and this can be added to any page. Actually, adding comments to a portlet or any asset can be done with the tag
liferay-ui:discussion by extending portlet capabilities via UI tags.
As you ...