Decentralized Physical Infrastructure Networks (DePINs) integrate blockchain technology with real-world infrastructure, enabling decentralized systems for applications such as storage, computing, and IoT. By incentivizing resource contributions from users, DePINs create scalable networks that address practical needs while reducing costs at a significant level. With a market capitalization exceeding $29 billion and poised to reach $3.5 trillion by 2028, the sector is expanding through projects like Arweave for decentralized storage and peaq for IoT applications. As DePINs evolve, they hold potential to bridge Web3 technology with mainstream use by addressing everyday needs like energy grids and autonomous networks. In this talk, we will cover the essentials of DePIN - the idea of DePIN, examples of its real-world applications, key players in the space as well as future outlook.