The Blockchain is a new way of storing and accessing information.
It is a public register of transactions.
Although usually associated with Bitcoin, the Blockchain can also work with other types of digital currency and processes.
These transactions are collected in blocks (files where data related to Bitcoin is recorded) in a process called mining (process of adding transaction records to Blockchain), which is done by thousands of people around the world.
Blockchain is essentially an online spreadsheet that anyone can view and that miners can verify and update.