What is Fork (Blockchain)?
Every time a community modifies the blockchain’s protocol, or fundamental set of guidelines, a fork occurs. When the fork happens, the chain divides, creating a second blockchain that is traveling in a different direction but has the same history as the original.
Blockchains are updated for a multitude of reasons, just like any software requires updates. For example, a functionality-add, dealing with security threats, or when it’s needed to settle a dispute concerning the future course of the coin within the community.