Compare and Contrast Social Networking Sites

	Facebook	LinkedIn	Google+
Creating account	Easy	Easy	Easy (but I already have Gmail)
Users	1.65 billion monthly active	450 million	Unclear*
Professional Usage	Yes**	Yes	Yes
Advertising	Yes	Yes***	Yes****
Ease of Use	Easy	Easy	Slightly Confusing, but not had to figure out with some time

*Several different sites reported that Google has 2.5 billion users, but when it comes to Google+ the numbers start getting sketchy.  Everyone that has a Gmail account is apparently automatically set up with Google+ (I never even realized this), but the numbers are actually really low when we look at people that actually post on Google+.  http://www.techtimes.com/articles/51205/20150506/many-users-google-really.htm

**Separate accounts should be created in a lot of cases (personal vs. professional)

https://www.impactbnd.com/blog/the-difference-between-facebook-twitter-linkedin-google-youtube-pinterest

***Mainly professionals will see advertising on LinkedIn, but do not expect a high click-through-rate. 

http://blog.hubspot.com/marketing/social-network-advertising#sm.0000273t31gmrdoapen2ee6h5qpn6

****Must have at least 1,000 followers on Google+

http://www.pagewiz.com/blog/ppc/google-plus-advertising