How to use Klaviyo’s subject line assistant

You will learn

Learn how to use Klaviyo’s AI-powered subject line assistant to improve your subject lines and streamline your campaign sending process. Choose an auto-generated subject line that’s customized based on your brand and message goals, or use these subject lines as inspiration when you draft your own.

Generate a subject line for a campaign

1. Navigate to the Campaigns tab.
2. Click Create campaign.
3. Name your campaign, select Single channel, and choose Email. Click Continue.
4. Choose the lists or segments to send to, and click Next.
5. In the Subject line field, describe your email’s topic using at least 3 words, then pause typing. The assistant will suggest up to 3 options.
   

6. Do one of the following:
   • Select one of the suggested subject lines which you can continue to edit.
   • Edit or add onto what you wrote to generate more specific suggestions.
   • Click Regenerate to create new suggestions based on what you wrote.
7. Review the final text in Subject line, complete your email content, then click Next to save and continue to review.

Generate a subject line for a flow

1. Navigate to the Flows tab.
2. Choose a flow, then click an email message within that flow.
3. Under Subject and sender, click Edit if the email is in Manual or Live status. In the Subject line field, describe your email’s topic using at least 3 words, then pause typing. The assistant will suggest up to 3 options.
   

4. Do one of the following:
   • Select one of the suggested subject lines which you can continue to edit.
   • Edit or add onto what you wrote to generate more specific suggestions.
   • Click Regenerate to create new suggestions based on what you wrote.
5. Review the final text in Subject line, then click Save.

Tips for success

The text field works best with natural language (i.e., whole sentences). If you’re not sure what to write, consider copying the product or event description from your website, or write as if you’re describing the topic to a friend. Here are some sample descriptions for a product launch:

• The ultra cushioned, ultra comfortable, ultra versatile trail running shoe
• We created the trail running shoe of your dreams, so you can spend less time shopping and more time outside

You can click Regenerate to request new suggestions. Consider making changes to the text field for more varied results, or use a generated subject line in the text field to create similar results. If you reach the daily generation limit, wait before trying again or write your own subject line.

Outcome

After completing these steps, you’ll have subject line ideas to use in your next campaign or flow email. To better understand which subject lines resonate with your audience, consider A/B testing a few options.

Additional resources