Web 2.0 allows users to interact with each other and share content online through features like blogs, wikis, social networks, and media uploading sites. Users can post links, photos, notes, and videos; comment and chat with others; collaboratively edit content; and create their own blogs, pages, and media. Popular examples of Web 2.0 include social media sites that let users connect, share information and media, and comment on each other's posts.