According to Foresight News, Starknet announced that the first mainnet vote for STRK holders will begin in 4 days (September 9).

STRK holders will have the opportunity to vote on key parameters of STRK staking, including the minting mechanism and the protocol for adjusting its parameters.

STRK holders need to make sure to delegate or self-delegate STRK before voting, as the snapshot will be taken before the voting begins.