With iOS 12, Siri began offering suggestions for shortcuts and more via the lock screen. You can disable these suggestions for individual apps or completely disable all Siri suggestions to clean up the lock screen.
Siri Suggestions is a little-known feature that allows Siri to periodically search for tasks that you perform on a regular basis, and then provide shortcuts to tasks at the best time. A good example of this would be if you place a coffee order at a certain time or place. Siri would theoretically notice this and then start recommending this action when the time comes. All you have to do is tap the notification to perform the action.
Depending on the app in question, Siri may make suggestions that appear on the lock screen If you want to get a bit too talkative or make suggestions for apps that are not important, you may want to turn them off. Luckily, you can turn off the feature for specific apps, rather than an all-or-nothing affair.
Disabling Siri Suggestions for All Apps
If you want to prevent all apps from making Siri suggestions When you enable the lock screen, you can toggle a switch.
To start, open Settings and tap Siri & Search.
Move the "Suggestions for Lock Screen" switch to the "Off" position.
To disable Siri suggestions for individual apps
To start, open the Settings app and tap Notifications.
. Then tap on "Siri Suggestions".
Apps that support Siri Suggestions, with a handy switch to disable apps that you do not need to watch.
To disable an app, turn the toggle switch to the off position.
If you later decide to show the suggestions again, just turn the same switch back on.