How do I bookmark a page if I want to return to it later?

When using the web version and the app, navigate to the page you wish to bookmark and tap/click the Bookmarks icon in the top menu bar. 

              

To reference it later in the web version and the app, simply tap/click on the My Content icon and tap/click on the desired page. 

                 

To remove the bookmark, click in the top right of the page to be removed from the Bookmarks section.