After you create and share your note, you can see how many times it's been viewed in your Settings. If you've shared it in multiple places, this will show how many times your note has been viewed in total.
Quick Steps: Settings > Notes
In the left menu, click Settings, then click Notes.
Find your note, then look at the number of views to see the all-time views it's received.
If you send a note in a text message, you can also see how many people clicked the note.