Confirmation overlays are available in three variations: confirmation, failure, and open on phone.
In most cases, an explicit confirmation is not needed. The natural change in the UI is enough to show that an action succeeded. An example is a chat message added to the history.
If the user’s action will not be visible in the UI, use the confirmation overlay to give the necessary feedback to the user.
If possible, change the UI itself instead of showing a confirmation overlay.
Display a failure message when an expected process fails, such as “phone can’t be reached.”
Open on phone
When an activity triggered from a wearable device is opened on the user’s phone, display a confirmation that this has occurred.