Preview Submission empowers your customers to confirm the information after filling out the form.
For example: Create a simple contact form as the illustration below.
Next, choose a Preview Submission Widget in your form.
Edit Preview Submission > Content > Settings.
Fill ID of the form which you want to set preview to Form ID, you also can enable Remove Empty Form Input Fields or Custom List Fields.
A view of your form:
After filling in information, the form will be displayed as below: