I think Web 2.0 can let users to interact with the website instead of just watching them. So users can upload videos and write comments on the internet, such as Youtube and Facebook. At the same time, the website has dynamic page update technology, which means users can update content without refreshing the entire page. Web 2.0 has also greatly promoted social networks and enhanced personalized recommendations. Now, compare to the Web 3.0 nowadays, they introduced the mobile application (Apps). People can use their phone to go to the social media directly without using browers, which is more convenient. In the future, more applications will incorporate AI, thereby improving the efficiency and ease of use of software for users.