For example, we’re a real estate company. We have an internal HubSpot form we want to use when submitting a loan application. So, the rep will open the form, and we want to have a lookup field where they can pick the address of the home (the data already resides in our HubSpot instance). That information will auto-populate a few other fields on the form, and then the rep can submit. This way, there are no errors and they pick the proper address. The only thing the rep needs to do on the form is enter the loan amount and the due date.