I will be honest I have not figured out how it is a social network site, because I use it mostly for pinning sites and posts I want to keep track of, refer to in the future, and to share on Everyday Inspired.
Last week I read a must read post on Less Cake More Frosting about Pinterest: Miss Manners Meets the Internet
I hope you take the time to read this blog post. There are so many important points in it about sharing the information you find on Pinterest, and how we treat other peoples work on the internet.
After you read the post, come back and share your thoughts.