Blockchain is a distributed ledger, for the sake of safety, uses something called a public key, with only the latter being used to unlock information. Moreover, no person can break into one computer and alter the records for fraudulent purposes.

Benefits of Blockchain:

1. Prevents corruption: it uses sophisticated mathematical encryption, using public and private keys, making sure nobody can corrupt the data.. .
2. Increases Speed and Saves Time: With blockchain, a distributed ledger makes sure all the information is put together in the same place. This naturally saves time and makes the process faster.
3. Cost Cutting: As efficiency is increased and so is speed, the cost is bound to go down.
4. Reduces Chances of Making Mistakes: Blockchain is decentralized, it is not controlled by one central authority.

There is a lot to know more about the Blockchain technology, and if you are curious to study the technology, I would suggest you go through this blog, as I have gain awareness from here itself.
https://www.altcoinsidekick.com/bitcoin-basic-blog/what-is-blockchain-technology