Sidechains are independent blockchains that run parallel to a main blockchain, enabling faster transaction processing and experimentation without compromising the main network’s security.
Assets can be transferred between the main blockchain and sidechain, which operates under its own consensus mechanism. Sidechains allow for innovations, such as testing new protocols or improving scalability, without risking the main blockchain’s integrity.
They are especially useful for dApps and projects looking for customization and flexibility in terms of transaction speed and cost.