What is a testnet?

In blockchain technology, a testnet is designed to test different improvements in the blockchain without the risk of causing any problems with the network. It can also act as an environment where dapp developers can test their decentralised applications.

With existing networks like Bitcoin or Ethereum, the testnet gives developers an environment very similar to the main blockchain. This is an essential part of the development process as it allows them to improve their code and make their apps better for the user.