It could boost traffic if you post links on group's pages. Find a group that has a similar interest to your site and join. Then you can post a link on their feed. Or post links on friend's pages. Or any page that will let you post for that matter.
The key is DO NOT spam. Posting more than 3 or 4 links in about 10 minutes will get Facebook's attention. That runs the risk that Facebook will ban you.
Plus, nobody likes a spammer.