Web 2.0 focuses on connecting people through technology rather than just connecting computers. Wikis allow for easy collaboration and ongoing learning. Blogs are websites with chronological posts that may include opinions, information, or links. Social bookmarking sites allow users to publicly tag and save bookmarks for others to search. Podcasting involves creating and distributing audio files online for listening on computers or MP3 players. Web collaboration tools enable real-time communication through video, voice, and messaging.