What is the purpose of using blockchain technology in digital currency?

Blockchain technology is used in digital currencies to enable secure and efficient transactions. It is a distributed, public ledger that keeps a record of all digital currency transactions and provides security and trust between the involved parties. With blockchain technology, digital currency transactions can be verified quickly and securely and be completed without the need for third-party intermediaries such as banks or credit card companies. This makes it easier and more cost-effective to send and receive digital currency around the world.