The most common question for newcomers to the world of crypto and blockchain is understanding what mainnet is. Testnet, devnet, mainnet... they all seem similar but are actually completely different stages. For me, understanding these differences was initially difficult, but then I realized they are quite simple.

When asked what mainnet is, the simplest explanation is this: it is the stage where a blockchain network is live and available for real-world use. During the mainnet phase, the game is over, and everyone is using real assets. You pay transaction fees, which we call gas fees. If an error occurs on the mainnet, real money is at risk. That’s why the protocol must be thoroughly tested before switching to mainnet.

So, what happens before mainnet? There is the devnet stage. This is like a playground for developers. Here, developers experiment, test new features, and write code. Devnet usually runs for a long time and is continuously updated by the team.

Then comes the testnet stage. Think of testnet as the final rehearsal before going live. Just like actors rehearse before the main show, blockchain projects test themselves here. The best part of testnet is that the tokens here have no value. You can experiment as much as you want, with no risk. In fact, many projects reward those who find and report bugs. It’s normal and even expected for issues to arise on testnet—that’s exactly the purpose.

In summary: devnet is the developer’s playground, testnet is the final rehearsal, and mainnet is the real show. Once you understand this sequence, the question “What is mainnet?” becomes much clearer. Mainnet is a live network, with real transactions and real fees. If you follow the blockchain ecosystem, seeing a new project go live on mainnet is an exciting moment.