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 blog is a website where people post commentary, news, video and other content. A blog can be a personal online diary, a way for politicians to connect with constituents, or a course website in a college class. The verb to blog means to add content to a blog.
