Whenever you post to your channel, we send an email to your followers letting them know about it. Starting today, you can opt not to notify followers via email for a particular post.
To disable the email notification, just uncheck the new “Notify your followers in their daily email” box when you post to your channel:
If you uncheck that box, the slice will still appear on your channel and in your followers’ feeds — it just won’t get emailed to your followers. This gives you an extra level of control over how your posts get announced to people.