1) Click on the account drop down button in your account's main navigation
2) Click on the Integrations option
3) Find the integration you would like to install and click on the Install button
4) Depending on which integration provider you are using, you may be directed to a page hosted by that provider. If so, follow the prompts the provider gives. If not, choose and/or enter the necessary information (may vary depending on the integration provider.) Once you're done, click the Save Credentials button.
5) The integration provider is now available for you to use on your payment forms. Learn how to add an integration to a payment form.