Web 2.0 refers to a second generation of the World Wide Web that is focused on user-generated content, usability, and interoperability. It encompasses three streams of development: technology, applications, and socialization. Web 2.0 allows for easier navigation, customization, communication, and collaboration between users. It has changed how people read online by requiring new skills like skimming and in-depth reading to process information. Web 2.0 tools can also help develop higher-order thinking skills when used for instruction. However, keeping students safe online is an ongoing concern that requires schools to carefully evaluate each website and teach digital responsibility.