Ethereum is one of the most important blockchain networks, not only because of the ETH currency, but also because of its ability to run smart contracts and decentralized applications. Smart contracts enable digital transactions to be executed according to predefined conditions without the need for a traditional intermediary in certain use cases. As the 3Web sector expands, understanding the fundamentals of Ethereum and smart contracts has become an essential part of comprehending the developments taking place in the world of digital assets.