Squarespace integration allows you to collect subscribers directly from its newsletter block. To set up the Squarespace integration, go to MailerLite Integrations page. Choose Squarespace and flip the integration status ON. Choose the list you wish to connect to and hit save.
Choose the page you want to add the form to. Click edit and click the top right plus icon. Choose the newsletter block and save it. There you go. When people sign up using this form, they will be added to the list we selected earlier.