If you are working on your application with a team you will be very interested in the following feature. This is the way to be informed about changes in your database. Once a user updates any record you will get an E-mail or SMS with the previous and current fields values.
Here is how you can enable it in the form widget. Make sure to update email or SMS recipients' list. You can enter as many emails (SMS) as you need, separated by comma.

And here is how updated records email notifications look like in action. Open 'Notifications' tab and choose 'Emails' or 'SMS':

Enable 'Record updated' option and click on the 'edit' icon to open the notification settings:

You can choose the recipients - Record owners or enter recipients manually. Also, you can change the letter's subject: