Meter(MTR) is the stablecoin which is synthetically generated by the protocol's standard system. Holders can use MTR to use as a medium of exchange, buy bonds or farm tokens in standard system.
Liter(LTR) is a liquidity provider token that represents a share from amm module. Similar to LP tokens in Uniswap, it can be burned in amm to receive deposited assets. Liter(LTR) token can be used for yield farming.
Standard(STND) is network and governance token to use Standard system. Standard token can be used for 3 cases
STND token holders also have an option to stake STNDs on the network. (Standard protocol validators or collators) By doing so, the staker receives the nomination reward and the network becomes more secured and decentralized.
to use Standard protocol's system, you need to pay fee with STND. STNDs can be burned or given to validators depending on the module's transaction.
STND represents shares for Standard protocol. STND holders can participate in governance of Standard ecosystem.