# Twilio SendGrid user interface documentation

Twilio SendGrid documentation has three main sections:

* User interface (UI) documentation (where you are now)
* [Developer documentation](/docs/sendgrid/for-developers)
* [API reference](/docs/sendgrid/api-reference)

![Email API Onboarding.](https://docs-resources.prod.twilio.com/c2c0897d44e26adb5b5336905d78a480f577cf32e89348f9731cc927c6a2214e.png)

The [SendGrid UI](https://login.sendgrid.com/) is also known as the web-based interface, App, or Console. You can do almost anything at SendGrid using APIs, but some features are available only in the UI.

For [Marketing Campaigns](/docs/sendgrid/ui/sending-email/how-to-send-email-with-marketing-campaigns), you'll spend most of your time in the SendGrid UI, building campaigns, managing contacts, and designing templates.

## Popular user interface documentation

### Domain Authentication and account setup

* [How to Set Up Domain Authentication](/docs/sendgrid/ui/account-and-settings/how-to-set-up-domain-authentication)
* [How to Set Up Link Branding](/docs/sendgrid/ui/account-and-settings/how-to-set-up-link-branding)

### Dynamic Templates and designs

* [How to Send an Email with Dynamic Templates](/docs/sendgrid/ui/sending-email/how-to-send-an-email-with-dynamic-templates)
* [The Design and Code Editor](/docs/sendgrid/ui/sending-email/editor)

### Marketing Campaigns

* [How to Send Email with Marketing Campaigns](/docs/sendgrid/ui/sending-email/how-to-send-email-with-marketing-campaigns)
* [Working with Marketing Campaigns Email Designs](/docs/sendgrid/ui/sending-email/working-with-marketing-campaigns-email-designs)

### Analytics and reporting

* [Email Activity Feed](/docs/sendgrid/ui/analytics-and-reporting/email-activity-feed)