What characterizes Web 2.0 applications?

Web 2.0 applications are characterized by collaborative user involvement, which emphasizes the shift from static web pages toward platforms that foster interaction, sharing, and collaboration among users. This era of the web has introduced functionalities that allow users not just to consume content, but also to create, share, and engage with it. Examples include social media platforms, wikis, and blogs, where multiple users can contribute, edit, and discuss content, showcasing the capability for collective intelligence and community engagement. This interactivity marks a significant advancement from the original web experience, where users primarily consumed content in a one-way communication model.