You have probably noticed that there is now the option to 'Recommend' a Post, Question, Comment or Poll.
This is the same as saying you 'Like' something.
You can use it to show appreciation for something that is really helpful, informative, moving or amusing or to show that you simply 'agree' with it in some way.
I believe that there are plans to expand on this function in the future in some way. But for the time being that is what it is for.
You can still comment as well if you wish - or not if you don't.
It can be a handy way for people to know that their contributions are being read, even if people have not commented.
Hope this helps!
For more information on how to use the new style site, please see here: