Do companies use networking sites to recruit candidates for jobs? I have a profile on Facebook and LinkedIn, but I don't know if companies actually look at these. Is there a way to make my profile come up in more searches by recruiters?

Do companies use networking sites to recruit candidates for jobs? I have a profile on Facebook and LinkedIn, but I don't know if companies actually look at these. Is there a way to make my profile come up in more searches by recruiters?