How do I put a newsletter sign-up box on one of my pages?

The newsletter sections show a form that you build in Contact Forms:

1. Go to Contact Forms and create a form with an email field.
2. Open your page in the builder, click + Add, choose the marketing category and pick Newsletter Row, Newsletter Column or Minimalist Newsletter.
3. On the Content tab, choose your form in Select Form.
4. Fill in Heading, Subheading and, on Newsletter Row and Newsletter Column, Disclaimer/Description.
5. Click Save.

To see who signed up, go to Contact Forms, click the gear icon on the form and open the Submissions tab.

Contact Forms is a plugin, so it has to be available on your store first.