Can I customize read tracking notifications?
You have several options related to read tracking. First, and probably most important, you can disable desktop and/or mobile notifications in your Settings.
Then, you may want to keep the Activity room in your sidebar to see the number of new people who read some of your emails, but you may not want this to affect the unread badge on your application Dock or tray (macOS / Windows) or home screen (iOS / Android). You can get this behavior by right-clicking the Activity room and unchecking Include in badge count:
Alternatively, if you want to use read tracking but do not care about live notifications at all, you may just remove the Activity room from your left sidebar by clicking the x next to it.