Web 2.0 refers to second-generation Internet-based services that emphasize online collaboration and sharing among users. It is characterized by dynamic content that is generated by users and the ability for users to interact and share information online through social media sites, portals, and open communication platforms. Web 2.0 aims to facilitate creativity, information sharing, and mass collaboration among users. Popular examples of Web 2.0 include social networking sites, wikis, communication platforms, and user-generated media sites that allow users to interact and share content.