The text discusses the process of interacting with and verifying smart contracts on blockchains like Ethereum using Etherscan, a block explorer that provides a middle ground between command-line interfaces and web applications for this purpose. It explains how smart contracts, which are publicly accessible computer programs on blockchains, can be interacted with using blockchain clients or through platforms like Etherscan, which allows verification of these contracts. The tutorial gives detailed instructions on deploying a smart contract using Remix IDE, compiling it with a specific version of the Solidity compiler, and then verifying it on Etherscan by matching the compiler version and license type, allowing users to interact with the contracts through Etherscan's interface. Moreover, for contracts with multiple Solidity files, the guide outlines steps using either a flattener plugin or the Etherscan plugin in Remix IDE to consolidate code and successfully complete verification, thus enabling broader user interaction with the contract.