Why is it recommended to keep “global unsubscribe” turned on in your account settings?

Global unsubscribe ensures that once a profile opts out, they will not receive any further marketing communications from your brand, regardless of which lists or segments they were previously on. This is crucial for maintaining compliance with anti-spam laws and respecting subscriber preferences, which positively impacts your sender reputation. If a profile is globally unsubscribed, Klaviyo will prevent any email or SMS from being sent to them. The other options are incorrect: global unsubscribe does not force double opt-in (that's a separate setting), nor does it manage consent across parent/child accounts, which is a more complex multi-account setup.