Compared to May 2012, Blogging (or blog/ bloggers) presented one of the biggest surprises:
'I would have guessed that blogging was a more mature field and that we wouldn't see 3x growth between early 2012 and today.'Either there are more blogs around, or people are more open about disclosing these on their public profiles and resumes. Or perhaps, a bit of both.
More at The Growth of Web Marketing Fields - Rand's Blog.