Before long, we've gone from static websites where the user was an simple observer toward dynamic websites, collaborative and participatory, where people become active, create content, and opinion and relations. This new website is called web 2.0 or social web.
Blogs are personal websites of internet users, a format that has revolutionized the schemas for published on the net. The site content are created by the users, which published articles and comments on their experiences, interests and skills and professional individuals. The links from the blog has created the blogesfera, the entire set of blogs, although more than that, the blogosphere is also a set of relationships between people who are behind the blogs, constitute a system of social relations. Blogs allow internet publish any information created with text, images and video.