It is built to be selective, not just an all-or-nothing mute
Rather than a single blanket "silence everything" switch, Focus mode is designed around exceptions -- you can silence almost everything while still letting a specific person or app through, which is what makes it usable for daily work rather than just emergencies.
Automation removes the need to remember to turn it on
Because a focus can be scheduled by time, location, or even a specific app launching, you get the benefit of blocking distractions without needing to remember to switch modes manually every single time.
Frequently Asked Questions
Can other people tell when I have a focus mode turned on?
If you turn on "Share Focus Status" in Messages, people who message you will see a note letting them know you have notifications silenced, so they know a delayed reply is not being ignored.
Does it turn on automatically across my other Apple devices too?
Yes -- if you turn on "Share across devices," turning on a focus on one device (like your iPhone) automatically applies it to your other signed-in Apple devices, like an iPad or Mac, at the same time.