Several years ago I was working for major network hardware vendor, we were using MS Yammer (now it seems to be renamed to Viva Engage) as internal social media.

Several years ago I was working for major network hardware vendor, we were using MS Yammer (now it seems to be renamed to Viva Engage) as internal social media. I wasn't heavy user of it, actually I think I have checked it few times during my whole employment there as most of my teammates. I remember it as a place for semiformal interaction, related to company, like bragging about releases and other milestones.