OneDrive Navigation Pane

[BrettPHall]

I had a question from one of my users asking about the links or groups in the Navigation pane.  This user has 3 links on the left, but in Teams or Yammer has more.  What governs or how do we add/remove this links?  

[#2]

Sites that you follow appear on the OneDrive tab, followed by frequented sites. So if you go to Team there in Teams, then Files > Open in SharePoint, top right corner follow the site, it should then show on the OneDrive page.

[#3]

Ok, thanks for that bit of information.  What about Yammer groups?  Only one of my Yammer groups show up on the left.