Grouping your brain dump on boards is the KEY to staying organized, communicating your vision and getting clients to rapidly make decisions in the new Wecora.  They are extremely powerful and extremely easy to use.  Just click + Add Group.  That's it.  Click the name to rename and drag and drop items between them.   Then share away! Groups help you cluster images in a way that makes to both you and your clients.  You don't have to use them, but we STRONGLY suggest that you do!  

Check out this blog post about naming groups as well for visual examples.