During a divorce, you will be required to divide your property. In California, you will be expected, in most cases, to divide your property 50-50.
Community property states, like California, make property division in divorce slightly easier by requiring an equal split of marital assets. That has its benefits, but it can also be difficult for couples who have not equally contributed to a marriage. There could be animosity or frustration with the idea of a party who did less for the marriage getting the same payout as someone who contributed more.
During your divorce, you probably know that the state requires an equal split of your assets. This applies only if you can't agree on a different arrangement, since the state is a community property state.
During a divorce, one of the things you have to talk about is how you plan to divide your property. Normally, people in California follow a 50-50 rule thanks to the state being a community property state. What that means is that any marital property is shared equally among the parties, not divided equitably.