Small and medium-sized businesses, or SMBs, have long used Facebook ( META -0.75% ) as what amounts to a free website platform. SMBs have also been quick to embrace free postings on Google ( GOOG 1.61% ) and Twitter ( TWTR ). But many of them are reluctant to advertise, limiting the revenue the social media companies can make. Facebook has tweaked its algorithms and announced the Fit campaign to make SMBs upgrade to ad solutions. The advertising trend of small businesses, along with Facebook's monetizing initiatives, will make the company successful at selling advertising.