ATOM is the native token of Cosmos, a decentralized network that provides open-source tools for developers to create their own interoperable blockchains. One of the biggest problems with blockchains is they are created independently and very few have the ability to transfer data between one another.
Cosmos is looking to become the “internet for blockchains,” allowing blockchains to freely share data and tokens across all the blockchains that are in the Cosmos ecosystem.