A Token in a Blockchain space are the Blockchain ledger entries (represented as numbers) which are tracked end-to-end among Blockchain peers & can be transacted independently between Blockchain addresses. They are just some virtual numbers like in some video games but has the tracking using the consensus algorithms on the Blockchain network. These tokens can represent anything in real life as long as you assign some values to it like 1 token is equal to 1 chair etc. In our case they are XRK ie. 1 Token = 1 XRK whose utility is to upload data in RecordsKeeper (XRKs are used as a fee for uploading records/data).