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Multi-person shared wallets of course also have various m/n modes, and there are many application scenarios. Let's talk about the 1/2 mode first. In other words, one wallet corresponds to two private keys, and any one of them can use the funds in it.
You may have to ask: Isn't this superfluous? Isn’t it enough for two people to have the same private key? What is the significance of the 1/n model? The most basic difference between 1/2 and 1/1 is that the accounts are clear. In other words, although two people have the same authority to use the same amount of funds, who issued each expenditure cannot be forged. In other words, you and I have the right to use the funds, but I have no right to impersonate you to use it.
Simple application cases such as husband and wife joint property and partnership business. Under normal circumstances, the husband and wife or buddies, regardless of each other, jointly manage funds, and if one of them has an accident or unexpected situation, the total assets can still be used in a timely manner. Once there are disagreements and disputes, when you have to go back and settle the accounts, the accounts are clear again, and who misused the money will be irresistible.