I like that its very similar to the most famous social media platforms, but kind of more professional and very fun to use for work.
Yammer is a great way to share info with your colleagues - whether it is a fun fact of the day or reinforcing important messages/due dates.
The perfect tool for setting up work channels. Easy to use, ability to create a number of different groups, can be linked through Microsoft Teams which is a great bonus.
Everything becomes lost in between groups, it's difficult to remember who posted what where.
I feel that this app offered from the many by Microsoft has just been left behind a bit. With Teams now being the boom, I believe Yammer will tend to die if it is not implemented within Teams.
Sometimes having too many tools in the O365 makes it confusing for users to follow up on. Found that deleting posts may be a challenge.