Ethereum courses can help you learn smart contract development, decentralized application (dApp) creation, blockchain fundamentals, and token standards like ERC-20. You can build skills in Solidity programming, security best practices for smart contracts, and how to deploy applications on the Ethereum network. Many courses introduce tools such as Remix for coding, Truffle for testing and deployment, and Metamask for wallet management, showing how these tools facilitate the development and interaction with Ethereum-based projects.