There is no right or wrong answer here.... but I've found very little discussion on this topic.  As I was just checking in a document that I plan on sharing with someone I thought... "What is the best way to tag this version of this doc as something meaningful?"  Checkin comments, labels, some other variable that can be cannibalized?  I found a thread here: Searching by Label

https://forum.solidworks.com/message/60972#comment-60972?q=label

But that didn't have too much information on labels either.  I'm just curious if anyone has tried using labels and found it to be a successful venture?