Twitter is an online social networking service that enables users to send and read short 140-character messages called “tweets”.
Registered users can read and post tweets, but unregistered users can only read them. Users access Twitter through the website interface, SMS, or mobile device app.
Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, family and social events.
Google+ is a place to connect with friends and family, and explore all of your interests. Share photos, send messages, and stay in touch with the people
LinkedIn has been described by online trade publication TechRepublic as having “become the de facto tool for professional networking”. LinkedIn has also been praised for its usefulness in fostering business relationships. “LinkedIn is, far and away, the most advantageous social networking tool available to job seekers and business professionals today,” according to Forbes.
Pinterest is a free website. Users can upload, save, sort, and manage images—known as pins—and other media content (e.g., videos and images) through collections known as pinboards.
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. Users can follow other users’ blogs, as well as make their blogs private. Much of the website’s features are accessed from the “dashboard” interface, where the option to post content and posts of followed blogs appear.
Instagram is an online mobile photo-sharing, video-sharing and social networking service that enables its users to take pictures and videos, and share them on a variety of social networking platforms, such as Facebook, Twitter, Tumblr and Flickr.
Flickr is an image hosting and video hosting website, and web services suite that was created by Ludicorp in 2004 and acquired by Yahoo in 2005. In addition to being a popular website for users to share and embed personal photographs, and effectively an online community, the service is widely used by photo researchers and by bloggers to host images that they embed in blogs and social media.
Meetup is an online social networking portal that facilitates offline group meetings in various localities around the world. Meetup allows members to find and join groups unified by a common interest, such as politics, books, games, movies, health, pets, careers or hobbies. Users enter their postal code or their city and the topic they want to meet about, and the website helps them arrange a place and time to meet. Topic listings are also available for users who only enter a location. Meetup receives revenue by charging fees to administrators of groups, currently at $12 to $19 per month depending on the payment plan.
Ask.fm is a newer site that is alike to social networks except it only uses Questions & Answers (Q&A) type of protocol. Where you ask a question and *hope* for an answer.