The proposed text says that it means
Windows Process Activation Service (WAS)
I always though it meant
IBM WebSphere Application Server (WAS)
How do I handle this? Approve or Reject?
If almost all questions tagged was are about the Windows WAS: accept the suggestion, retag the few questions that aren't about the Windows WAS.
If almost all questions tagged was are about the IBM WAS: reject the suggestion, retag the few questions that aren't about the IBM WAS.
If was is an ambiguous tag, with a significant number of questions about either topic, then the tag should be split, perhaps into windows-was or ibm-was. (I have no idea if these particular names are appropriate.) Raise the issue on [metaso]; try to get the attention of the top people in the tag. Hopefully a consensus on tag names will be reached, then get people to help retag the questions until the ambiguous tag is no more. Optionally, once the new tag names have been agreed on, request that the developers blacklist the ambiguous tag.