Which words are you having trouble with? That's pretty straight forward, but I'm assuming you're wanting to know more about the across devices thing... This is actually one of my favorite features. Their system keeps track of where you're logged in from and whether you're active or idle on that platform, then if you are sent 1-1 messages or mentioned in a room it will find you, delivering to a computer client first, then push notifications, then email--which is really valuable for us.