Some of the main platforms:
Twitter is a microblogging site great for breaking news
Facebook is a social utility that connects people with friends and others who work, study and live around them.
Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.
Flickr is a photo sharing network
Instagram is an instant photo and video sharing network
Google + is a place to connect with others and form groups
LinkedIn – Business and professional networking
Soundcloud – share your audio!
Delicious is a social bookmarking site
Tumblr – is a microblogging platform and social networking website founded by David Karp and owned by Yahoo! Inc. The service allows users to post multimedia and other content to a short-form blog.
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