On your form you may have a field that requests a user to select an option. When linking to this form, you can pre-select one of those options by following these steps:
Get the URL of the form you want to hit (e.g. https://yoursite.com/form/1234). To pass data into a specific field, you just include the field and value in the query string as such https://yoursite.com/form/1234?field_1234_5678=Smart%20Mobility, which will pre-select the interested in field on the form.
You can get the query string field name by grabbing the field_####_#### number on the order questions screen.