This number one social network goes head-to-head with Google on a daily basis for top referrer to many major sites, and for top most-visited site on the web.
What is Facebook
100
A mobile-based media famous for “check-ins”, where users earn “badges” as a reward
What is Foursquare
100
A way to shout out to other users of a social network in a post, comment or tweet
What is a mention
200
Also the second largest search platform, this video-based social media is the second largest social network by some measures.
What is YouTube
200
Quickly becoming one of the top social networks, this photo sharing service has a ton of features for sharing and exploring
What is Flickr
200
Attaching short, searchable phrases as labels to posts, images, etc. allowing for easy linking and navigation
What is tagging
300
On the border between big and b-list, this smaller top platform focuses on careers and business connections.
What is LinkedIn
300
A social news site, or social bookmarking site, where users can vote content up or down
What is Reddit
300
Allows users to send messages to each others’ inboxes within the site or to chat in real time
What is messaging
400
An online social networking service that enables users to send and read short 140-character messages
What is Twitter
400
With some check-in features similar to Foursquare, this social site focuses more on rankings, reviews & business info
What is Yelp
400
A personalized page that an individual creates on a social network site
What is a profile
500
A free social networking website that allows registered users to post multimedia content to their own customizable blogs
What is Tumblr
500
A web and mobile application that offers a visual discovery, collection, sharing, and storage tool in which users create and share the collections of visual bookmarks
What is Pinterest
500
A small block of content on a web page with a specific purpose that constantly updates itself