Most questions up till now used openlayers to refer to openlayers-2. With increasing interest in openlayers-3, we will see more questions on this topic. The two versions are so different that answers for one won't be helpful for the other. I therefore suggest the following synonym to make the version explicit:
Now that the tag synonym has been proposed by @Underdark at https://gis.stackexchange.com/tags/openlayers-2/synonyms, and upvoted by me there, I will be very interested to see if we have enough people with sufficient openlayers-2 reputation to get this through (or squash it) without us needing to use a moderator tool.
Users with a total answer score (total upvotes minus total downvotes) of 5 or more on the tag, can vote for tag synonyms. Suggestions will be automatically approved when they reach a score of 4, and automatically deleted when they reach a score of -2.