Google grants RSUs (Restricted Stock Units) that vest over years with a -year cliff.
Unlike Amazon's back-loaded schedule (///), Google's vesting is roughly even: % per year. After your first anniversary, shares vest monthly.
Google also does annual equity refreshers. If stock price increases, your effective TC goes up. If you got \200$400$K.
Refreshers are based on performance ratings. A strong performer at L5 might get \100$200$K in additional RSUs each year.