A more thorough explanation:

Joint life insurance is a type of life insurance that covers two or more people and pays out to the surviving policyholder(s) when one of them dies. This type of insurance is often purchased by couples or business partners who want to ensure that the surviving partner or partners are financially protected in the event of one partner's death.

For example, a married couple might purchase joint life insurance so that if one of them dies, the surviving spouse will receive a payout that can help cover expenses and maintain their standard of living. Similarly, business partners might purchase joint life insurance to ensure that the business can continue operating if one partner dies.