Blockchain is a decentralised and distributed record of transactions that is shared across a network. The network of the blockchain is built up on the users willing to use it.
And the upside of blockchain technology is that it is decentralised. That means it’s not owned or controlled by one entity.
Every new transactions is put onto a block of data. And each block of transactions has a record of the previous blocks. Keeping an ongoing and immutable record of data and previous transactions.
This makes all the information shared on the blockchain transparent, immutable and trusted.
Learn more about how blockchain works here