It’s no surprise that with the 
increasing popularity of Facebook and Twitter (Facebook usage continued to grow 40% since October 2011), more marketers are also spending more time on these social sites. As other social sites have started to attract more users, like YouTube and Tumblr, which saw an increase of 172% in audience size from 2010 to 2011, according to a comScore report, marketers have decided to branch out of their social networking comfort zones and join them.
70% of US marketers believe that their next step in social media is to increase their presence across multiple social media platforms, according to an article on eMarketer. This makes sense since 88% of marketers have already found their way to Facebook and 83% are already active on Twitter. 
Facebook can expect to see an additional 6% of those not already engaged on the site, while 8% of non-Tweeters plan to use the site within the coming year. An additional 28% of marketers plan to increase their use of blogs and 18% want to begin marketing on YouTube.
Sites like Pinterest that are seeing an increase in usage can expect more and more marketers to appear. The site saw a 512% increase in time spent on the site since May 2011. Pinterest follows right behind Facebook and Tumblr when it comes to time spent on the site and as the trend shows, it is only a matter of time before marketers and brands flock to these sites as well to keep up with their consumers.