A social network service provides access to an online community of friends, business associates or people with whom you share a common interest. Examples of popular social networking websites include Flickr (share your photos), Facebook, Goodreads (review your favorite books), MySpace, LinkedIn (professional networking), and Twitter.
A screencast is a short video that demonstrates how to perform a task or use a piece of software. It documents the changes in the user's computer screen, as he or she moves through the steps in a process.
