A tToken acts as an ownership proof, or a proof-of-liquidity, for funds deposited to the Teller protocol. tTokens are interest-bearing assets, i.e. lenders will earn interest on the underlying assets deposited to the protocol. Upon depositing an asset like DAI to the lending pool, for example, the lender receives minted tDAI tokens that will be burned and redeemed as interest returns once the lender withdraws the deposited funds.