Yammer is a Microsoft product and a business social networking and collaboration platform. Like most of these tools Yammer offers you the possibility to chat one-on-one or in group/team conversations, share ideas, ask questions and spend less time on formal emails and collaborate faster.
Teams can divide in different channels, and of course you can work together on files due to a strong connection with other Microsoft products.
Look and Feel?
Certainly meets expectations, modern and user-friendly
Some conceptual and technical innovations
Easy to implement?
Some effort required
Yammer has the overall look and feel of other well known social media platforms, and that is exactly why it is so easy to use. The basic functionalities are so common.
Tools like Yammer help to keep your employees informed, it works like your intranet, but then in a far more social way. And besides that it allows your people to come together in team channels and work on tasks and projects together.
Of course the strong Microsoft connection is benefit for Yammer. Whether you like your office products or not, still a wide range of companies use them and you will have to make do. Using Yammer to work easier together and give it a social component can be considered a strong benefit.