To use the HubSpot AI Content Assistant to create email templates, you can follow these steps:

1. Access the Content Assistant: Navigate to your HubSpot portal and access the Content Assistant feature. Depending on the availability you might need to enroll in the beta program to access this feature if it's not yet available in all portals.

2. Choose Email Template Creation: Once in the Content Assistant, select the option for creating email content. This feature provides prompts and suggestions for structuring and enhancing email templates.

3. Generate Subject Lines: Use the Content Assistant to generate multiple options for subject lines that are both engaging and to your email content.

4. Craft Email Content: Utilize AI-powered prompts to create engaging and well-structured email content. The tool can assist in generating headings, paragraphs, and subsections for your emails, improving their readability and engagement.

5. Refine and Personalize: After the AI generates the initial email content, you can refine and personalize it to your specific needs and brand voice. This step can include adding links, dates, and personal touches that resonate with your audience.

6. Review and Send: Review the generated email content to ensure it aligns with your goals and branding. Once you're satisfied, you can use the content assistant to easily structure the email for improved readability and engagement.

following these steps, you can effectively leverage HubSpot's AI Content Assistant to create compelling and effective email templates for your marketing campaigns.