When a contact submits your form, they will trigger a form submit action. The form submit action defaults to show a "thank you" message which can be edited. To change the "thank you" message that appears when a contact submits your form, follow the steps below:
1. Click on "Forms" from the left navigation menu in your account.
2. Click "Edit" next to your form.
3. Click the “Options” tab from the right side menu.
4. Select “Show Thank You” from the “On Submit” dropdown and enter your preferred text into the text box.
This "Thank you" message can be personalized to display a contact's first name, email address, or any other information you've collected through your form.
Just type the personalization tag for the field you would like to insert into the message box. For example, if you wanted to address contacts by their first name, you would type: %FIRSTNAME%