Validators, like Staking Facilities, are special nodes responsible for the provision of infrastructure as well as proposing and validating new blocks and appending them to the blockchain. Hence, together with other validators, they ensure the blockchains' security by monitoring its accuracy, establishing validity, guaranteeing availability, and provisioning the infrastructure for it to run on.

The right to validate and add blocks, hence, to secure the validity of the blockchain, is attached to every PoS token. Token holders who do not want to act as a validator, but still want to contribute to the blockchain’s security and earn rewards, can delegate the rights contained in their tokens to a validator of their choice. These token holders are called delegators and can be considered as a validators' customer.