There are some different types of social media users on the web.
Some of them are born to lead and the others to follow. In social media, the categorization is not that strict. However, there are still some leaders and followers as in all other aspects of life.
It is really important to know the user categories in order to place the campaigns on social media properly. When placing an ad/campaign, the most important thing is the type of audience that will see the ad/campaign.
Here is the categorization of your audience.
p.s: In the infographic, the effect of social media before purchase is also mentioned. Please check-out ZMOT for details. (Zero-Moment-Of-Truth by Google)