I asked a question few days ago, and while it received few upvotes, no one answered it. I'd like to "bump" it, so that it goes to the top. Can I do it? How can I do it?
Technically any activity on the question will get it back on the front page, but bounties are the real way to get your question more visibility. See this main meta question for more information
Any question with neither upvoted nor accepted answers will be automatically bumped to the top from time to time, but typically that only happens a few times a year. If you want to draw attention to your question, the best way is to offer a bounty.