Bitcoin Core is the original software that enables users to interact with the Bitcoin network. It serves as a full node, meaning it downloads and verifies the entire blockchain, ensuring the integrity of transactions. By running Bitcoin Core, users contribute to the network's security and decentralization. The software also includes a wallet feature, allowing users to send and receive Bitcoin. It provides a user-friendly interface for managing funds and offers advanced options for experienced users. Regular updates ensure that Bitcoin Core remains secure and efficient, adapting to the evolving needs of the Bitcoin community.