Navigate to Content > Landing Pages > Create a new landing page. This will prompt you to create a new Landing Page, but in this case we'll call it a Thank You Page since you will be using it as a secondary page where contacts will land on after visiting the first, initial Landing Page.
Name the new page, select a template that does not have a form > click on Create.
Once you are done creating your Thank You Page, go to the Publish or Schedule tab, select to Publish now, and click on Publish.
Navigate back to the Content > Landing Pages, locate the initial Landing Page contacts will visit first, and access it for editing.
Locate the Form Module, click on it, and under What should a visitor see after submitting your form? select Redirect to another page, then choose the title of the Thank You page you just created from the drop-down.
Finally, click Done > Save> then Publish or Update Page.
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