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. Choose Email.
4. Name your campaign, choose the lists or segments to send to, and click Continue to Content.
5. In the Subject Line field, describe the context of your subject line, and the assistant will suggest 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.

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. In the sidebar, in the Subject and sender section, describe the context of your subject line, and the assistant will suggest 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.

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 as many times as you want, until you find a subject line you like. 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.

Outcome

After completing these steps, you’ll have access to unlimited 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 

• Subject line best practices (Klaviyo blog)
• Using Emojis in Subject Lines and Email Templates
• How to Insert Preview Text into an Email