For some time, iOS has made it possible to hide alerts on a Messages thread. This can be useful when a slew of text messages comes in, and you need the iPhone to remain quiet. Similar to hide alerts, Apple has added a mute function to email threads on the iPhone, iPad and iPod touch.
Do Not Disturb
For reasons unknown, iOS has changed "Do Not Disturb" to "Hide Alerts." Its function is identical, so no worries, you can still silence annoying conversation threads. Simply tap the Info button in the top right of a thread and toggle on Hide Alerts.
The Do Not Disturb feature on your iPhone allows you to silence calls and notifications when you do not want to be bothered. You can manually enable Do Not Disturb from your Control Center when you are at the movies, relaxing or in a meeting, or you can schedule a recurring time, like when you typically go to bed. You can also choose who can and cannot contact you when Do Not Disturb is enabled.
Quickly enabling Do Not Disturb is a key feature of the iOS Control Center. Apple has added more flexibility over the years, with options to temporarily switch on Do Not Disturb and deactivate it automatically. Do Not Disturb can be set to disable itself after an ongoing Calendar event, when the user leaves a specific location, and more.
Putting your phone down at night can be a hard thing to do, especially if you are constantly bombarded with messages, emails and other notifications. While Do Not Disturb silences notifications, you will still see them pop up if you are using your iPhone for something else like reading an e-book or a web page before closing your eyes for the night, and sometimes all it takes is one pesky notification to send you down a rabbit hole for the next half hour or so. iOS 12 introduces a Bedtime Mode for Do Not Disturb that will block notifications from showing while you are using your iPhone.