We must get #with it

How to use hashtags on Google+, Twitter and LinkedIn

Hashtags have become the standard way to label social media posts, not only on Twitter but also on Google+ and increasingly on LinkedIn. Monitoring hashtags is an easy way to spot a social media trend and to respond accordingly.
However, it is rather unclear what kind of hashtags tend to trend on these three major social channels. I thought it would be interesting to compare trending hashtags on a given day (in this case, 17th April 2013) to understand the differences between the platforms.