How to customize the "Thank you page"?

The thank you page is the screen that your users see after they have submitted your form.
In Youform, you can add multiple thank-you pages, even in the free plan.
We add a default thank you page when you create a form, but to add another thank you page, you can click on the plus button on the left side beside the thank you page title.
Now to customize a thank you page you can do the following things:
    Add a title
    Add a description
    Add an embed (like Loom or YouTube)
    Change CTA (Call-to-action) button text and link
    Redirect your users to a different URL.
Out of these, the first three are free. To customize the button or redirect your user, you need to have a Pro account.

In the button link or the redirect URL, you can even mention any of your answers or variables. Just start typing @ and it will suggest. Useful to send some form data as a query parameter in your URLs.