A fork is a change to the software of the digital currency that creates two separate versions of the blockchain with a shared history. Forks can be temporary, lasting for a few minutes, or can be a permanent split in the network creating two separate versions of the blockchain. When this happens, two different digital currencies are also created.
What is a bitcoin fork?
There has been significant news coverage and developments in recent weeks about changes to digital currency networks. These are sometimes called “forks”
Why do forks happen?
There are a few reasons why a fork can happen. For example, when a change is proposed to a digital currency protocol, users need to show their support for the new version and upgrade — in a similar way to people regularly update applications on their computer. In order for these changes to get approved many people need to agree, just as changes to cellphone networks require many phone companies to agree.