Should we optimize the tags both for "connecting experts with questions" and for search engines to better index the questions? The above Help page mentions:
Because the tags appear below the question and tags are indexed by search engines along with the content of your question, you can trust that other people will be able to find your question based on tags they follow or search for.
If the goal of tagging does include search engine optimization, what does this mean for ambiguous tags, such as
title? See this question, although the tag issue is not limited to Stack Overflow, and extends across other Stack Exchange sites.
Tagging best practices