For newcomers to the blockchain world, the terminology can be a bit confusing. Testnet, devnet, mainnet... they all seem similar but are actually completely different stages. Today, I want to explain the differences among these three because the answer to "What is mainnet?" becomes clearer once you understand the others.

Think of mainnet simply: this is where the blockchain protocol operates live in the real world. No more testing, this is the real deal. Users can perform transactions, transfer assets, and smart contracts run. But you have to pay a fee for each transaction, called gas fee. When asked "What is mainnet?" I would say: "Real money, real transactions, real results." If you make a mistake, that mistake is permanent. Everything on the mainnet stage is very serious because real assets and values are involved.

Testnet, on the other hand, is very different from mainnet. Nothing here is paid. The tokens you use have no real value; they are only for testing purposes. Just like actors rehearse before the main show in theater, blockchain projects need to test themselves on the testnet. In fact, many testnets reward people who find and report bugs. The goal is simple: identify potential issues before moving to mainnet.

Devnet is an intermediate stage used by software development teams. Testnets are usually active for a limited time, then shut down or replaced. But devnet is more long-lasting; developers work here continuously. The progression typically goes: devnet → testnet → mainnet.

In summary, the answer to "What is mainnet?" is: "The network where the blockchain protocol is fully ready, live, and operational." But before reaching this point, passing through testnet and devnet stages is essential. That’s why these three stages are so important in the blockchain world.