In the user page searching questions and answers are very difficult. If we had tag sorting that would make it easier to find the questions and answers that I've participated in.
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- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
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This already exists: if you scroll down the user page, you'll see a list of tags:
Clicking on them will take you to a search results page that will you only questions and answers from that user for that specific tag.
If you want to further refine it, just add