A testnet is a blockchain network used for testing applications, contracts, and transactions without using mainnet assets.
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Short definition
Testnet is a testnet is a blockchain network used for testing applications, contracts, and transactions without using mainnet assets.
Simple explanation
Testnets allow developers and users to experiment with test tokens before going live.
Why it matters
Testnets help reduce development risk, but testnet assets usually do not represent real value.
Example context
A project may deploy a smart contract to a testnet before deploying to mainnet.