Ethereum is the platform where users can build, share and use their own Dapps (decentralised applications), which are programs capable of being shared within the Ethereum blockchain network.
Or simply, developers can use Ethereum’s blockchain network to send code from one device to another, which can be used to operate programs.
When these Dapps are employed to the network, the same blockchain system of verification is triggered, and miners operating from thousands of nodes will update the block to the chain.
This same blockchain concept as Bitcoin trading gives Ethereum the capability of providing a decentralised platform where users can interact and perform almost any task without reliance of a third party.
This internet-based direct mode of communication and information sharing can allow users to perform any digital task without relying on the help of third parties, potentially making brands like Amazon, Facebook and DropBox redundant.
This is where the cryptocurrency comes in when using Ethereum.