Social media has fundamentally changed communication and how information is shared. Key points:
1) Web 2.0 allows for user participation and collaboration through tools like wikis, blogs, social bookmarks, and user-generated content sites.
2) Social media use is widespread, with platforms like Facebook, Twitter, LinkedIn, and YouTube all seeing billions of users and views daily.
3) Businesses are recognizing social media's potential for continual customer engagement, global reach, accessibility, and real-time updates. Industries are finding uses in healthcare, marketing, journalism, education and more.
4) Schools are integrating social media tools into curricula to prepare students for a participatory digital world, but