Deploying a smart contract is the process of submitting the code to the Ethereum blockchain. This is done by using a tool such as Truffle or Remix.
For example, using Truffle:
1. Compile the smart contract code to generate the ABI and bytecode.
2. Create a Truffle project and add the smart contract code to it.
3. Configure the project to connect to a local or remote Ethereum node.
4. Run the Truffle migrate command to deploy the smart contract to the blockchain.