Social media marketing isn't free; try the paid ads

Several years ago, social media marketing was seen as a golden opportunity to
reach and promote to customers for free. In certain aspects, this was true. 

source

Now, however, with greater competition and a more astute audience, paid promotion

across is all-but essential. That's not to say you can't still achieve brilliant results
without spending a penny, but even a nominal figure, spent well (such as $5 per
day on highly targeted Facebook ads), can noticeably compound a brand's
success. The key to a lot of successful social media advertising are promotions
that blend into a user's experience of the site or app on which they appear,
mirroring the tone and publishing style of the audience - as with non-paid
content, think seamless instead of disruptive.