This document discusses digital literacy and its role in teaching and learning. It begins by outlining the key components of digital literacy, including communication and collaboration, critical thinking, citizenship, creativity, and self-efficacy. It then discusses the evolution of the web from Web 1.0 to the current Web 2.0 model and how this has impacted technology use, teaching, schools, parents, teachers, hardware/software, and views of graduates. The document proposes how Web 3.0, 4.0 and 5.0 may further transform these areas in the future. It also illustrates the relationships between content knowledge, pedagogical knowledge, technological knowledge, pedagogical content knowledge, technological pedagogical knowledge,