How do you put a link to another question, I have seen them, but I don't know how to do it.
Include that link in your question (or answer) and the site will automatically handle the title formatting for you: How do you put a link to another question?
Or you can link to it using the markdown link syntax:
[link title](URL), like this.
More details can be found in our formatting help page.
Note that you should also use this link when sharing a question outside of the site. It includes your user ID, so you get credit for sharing the question.
This leads to the Announcer, Booster, and Publicist badges.