Horizontal social networks.

Social networks as virtual environments for communication, interaction and the sharing of resources. They can be divided into two groups: horizontal or general social networks and vertical or thematic social networks. First, we're going to learn horizontal social networks. The most popular examples of
horizontal networks are:

• Facebook: Allows groups of friends to publish both public and private messages with text, links, news, photos and videos. We can share information about how they are feeling or what they are doing at any particular moment.

• Twitter: Users publish shorts text messages called tweets with no more tan 140 characters. The relation between users are not always bidirectional. One of the most interesting functions is using hashtags to follow interesting events or topics. Is available for mobile devices.

• Google + : Let users to create 'circles' of friends in order to share information. They can share photos and form public or private communities. There are messages called Hangouts lets users connect with each other for audio conversations and videoconferences.