A year is a long time, but it’s an eternity in social media.

Do you remember all the way back to January, when Pinterest was named the best new startup of 2011, and Facebook introduced Timeline? In May Facebook had their much-hyped IPO, August saw Instagram top Twitter for daily active users and in November, President Obama’s election victory message became the most retweeted Twitter post of all time.

This infographic takes a look at what happened in social media in 2012.

(Source: Seo Co.)