Crypto tokens represent a particular fungible and tradable asset or a utility that is often found on a blockchain.
The difference between a cryptocurrency coin and a token:
A cryptocurrency coin, like Bitcoin, Bitcoin Cash, Ethereum is independent of a platform. They can be used as a form of currency outside their native environment. Basically, these are the “cryptocurrencies” that we are all familiar with.
However, on the other hand, OmiseGO, Golem, etc. are examples of tokens which exist on a particular platform, in this case, Ethereum.