It really depends on what your business is, who your target audience are, and how do you use social media.
If you do it properly, you can use Craiglist like airbnb use it to “Growth Hack” their spots.
Most popular social media for marketing uses now are:
LinkedIn
Facebook
Twitter
Instagram
Youtube
Of course, there are others like:
Vine
Vimeo
Quora
Craigslist
and even reddit
It really depends on how you use a media to elevate your business.
