What it means
Removing a person from an Apple shared-password group ends their group access. Rotating the actual password at the relevant website invalidates the old secret. These are complementary actions when someone who previously had access should no longer be able to sign in.
A real-world example
A former housemate is removed from a streaming-password group but still remembers the old account password. They can keep using it until the service password and sessions are changed.
What to do
Remove the member, change credentials for accounts you own and review active sessions. Update the shared entry for people who should keep access.
The distinction that matters
Passkeys and Sign in with Apple credentials may need service-specific review too. Apple's personal safety guidance warns that former members can retain earlier account access, so a green group-membership screen is not the whole test. Prioritize financial and recovery accounts first.
Apple's shared-password safety guidance