I know it is early, but most of the tag-related questions asked thus far are about naming conventions to resolve duplicates. I am asking about conventions to resolve ambiguity.
For example, “Medicare” (medicare) may be the official name of the federal health agency in Australia, the unofficial name of the federal health system in Canada, or a government-supported health insurance system for senior citizens in the United States. It also appears to be the name of a private insurance scheme in the UK and a hospital system in South Africa among others. Obviously, questions about one of these programs are unrelated to questions about any other.
We could make the tags more specific, e.g. canada-medicare, or we could replace them with more generic ones, e.g. healthcare. For the time being, I tend to favor the latter, just as we have unemployment-benefits not canada-employment-insurance or ireland-jobseekers-benefit.