The notification tweaks can be found in your account tweaks.
To access them, select your profile picture in the top-right corner, then click prefs.
To open your account controls, punch your profile picture, in the top-right corner, then on controls.
How to configure your notification controls
Once in the controls, switch to the Notifications tab.
On Twitch, is used to control the notifications that you might receive within a twitch internet tool tab.
By Email, is used to control which notifications can be sent to your email address.
On Mobile, controls which notifications can be sent to your smartphone.
nudge the slider to the Off position to disable notifications from a specific channel.
Tip: By default, all notifications are enabled for all devices and all channels.
you might toggle all notifications or combinations of individual notifications off for each gear.
