You're partially correct. It does provide you with an opportunity to obtain job information from them. But - at the same time - they are checking you out. These things are usually attended by hiring managers & educators. They will be talking to you about your interests & abilities. They'll also be making value judgments about how you present yourself - maybe not deliberately, but this is unavoidable.
So, make sure you are dressed professionally and have clean copies of your resume. Be prepared to answer questions about your career aspirations & past experiences. Show them that you're exactly who they are looking for!