Explore the top 15 most popular social networking sites that have changed over the years, and you can expect them to continue to change as times goes on. Old social media trends are changing day by day, and the new trends are appearing.
1Facebook

Focus: Photos, Videos, Blogs, Apps.
Date Launched: February 2004.
Registered Users: 1.44 billion+
Website: www.facebook.com
2Twitter

Focus: Micro-blogging, RSS, updates.
Date Launched: 15 July 2006.
Registered Users: 302 million+
Website: www.twitter.com
3LinkedIn

Focus: Business & Professional Networking.
Date Launched: May 2003.
Registered Users: 400 million+
Website: www.linkedin.com
4Pinterest

Focus: Visual discovery, Collection & Storage tool.
Date Launched: 2011.
Registered Users: 70 billion+
Website: www.pinterest.com
5Google+

Focus: General.
Date Launched: 28 June 2011.
Registered Users: 418 million+
Website: plus.google.com
6Tumblr

Focus: Microblogging & Social networking.
Date Launched: February 2007.
Registered Users: 110 million+
Website: www.tumblr.com
7Instagram

Focus: Photos & Videos sharing.
Date Launched: 6 October 2010.
Registered Users: 100 million+
Website: www.instagram.com
Top 15 Most Popular Social Networking Sites
8VK

Focus: Photos, Videos, Blogs, Apps.
Date Launched: 10 October 2006.
Registered Users: 450 million+
Website: www.vk.com
9Flickr

Focus: Photos & Videos sharing.
Date Launched: 10 February 2004.
Registered Users: 650 million+
Website: www.flickr.com
10Vine

Focus: Video Sharing.
Date Launched: 24 January 2013.
Registered Users: 200 million+
Website: www.vine.co
11Meetup

Focus: General.
Date Launched: 12 June 2002.
Registered Users: 40 million+
Website: www.meetup.com
12Tagged

Focus: General.
Date Launched: October 2004.
Registered Users: 38 million+
Website: www.tagged.com
13Foursquare

Focus: Geo location based Mobile Social network.
Date Launched: 11 March 2009.
Registered Users: 45 million+
Website: www.foursquare.com
14Myspace

Focus: Geo location based Mobile Social network.
Date Launched: 01 August 2003.
Registered Users: 36 million+
Website: www.myspace.com
15Classmates

Focus: General.
Date Launched: 17 November 1995.
Registered Users: 15 million+
Website: www.classmates.com