Web 2 came next. Some people call this the “read/write” version of the internet, in reference to a computer code that lets you both open and edit files rather than just view them. This version of the Internet allowed people to not only consume content, but create their own and publish it on blogs like Tumblr, Internet forums and marketplaces like Craigslist. Later, the emergence of social media platforms including Facebook, Twitter and Instagram took content sharing to new heights.
What is Web 3: Whats Driving the Web 3 Buzz – Coindesk
