There should be a link that says: "Click here to learn how to select an answer as best." When you click it, it could lead to some instructional video about selecting an answer as best. First it shows you how to ask a question, and then it tells you once you get an answer for your question how to select the answer as best. And then it zooms into the green check mark before it gets clicked. There also wouldn't be any voices in the video, just words on the screen that would disappear after a few second to prevent the screen from being blocked. Sorry if this comment was a little quirky!