How Do Testnets Work?
The term "testnet" refers to a separate blockchain where new features can be implemented without endangering the main network.
If new tools or products aren't rigorously tested under a variety of conditions before being added to a live blockchain, there could be serious implications. In the worst situation, flaws could appear that hackers could exploit, costing individuals money.

Developers continue to search for faults when a testnet is active. Additionally, they might ask a few people to test the blockchain in order to receive helpful input.

After been tested on a testnet, a feature may then be added to the mainnet. Decentralized networks, on the other hand, can require that ecosystem participants be given the chance to vote first.
Additionally, testnets can offer a useful simulation tool that enables users to experiment with cryptocurrencies and attempt new things risk-free.