Facebook allows paid promotion of posts. In less than $10, you can reach like 5k people. At least that is the ad I saw from Facebook on my stream. Those traffic is genuine. Many bloggers make use of it increase the popularity.
Make positive, upbeat posts.
Favor exciting or interesting content
Include plenty of visual content
Keep posts and captions brief
Feel free to post gimmicky photos
Post things your Facebook friends will want to share
Like and share other users' content
Donï¿½t post too often
There are many pinterest and blogging groups that allow promotion of your posts. You can join such groups and get social traffic from these. It is basically give and take. You have to share other blogger's content as well.