The preheader is the short text that follows the subject line and that can be viewed only in the list view of your inbox. It is designed to support the subject line in conveying the essence of an email. A good preheader should act as a second subject line and convince your contacts to open the email.
You can add the preheader text while creating a campaign. It appears in the Subject section of campaign creation. Please refer the screenshot under point 5 below. To add the preheader text for your email :
From theNavigation toolbar, selectCampaigns and chooseEmail Campaigns.
Click Create Campaign on the top-right and select Regular email.
Add a campaign name to distinguish it from the other campaigns. If you only have the default topic associated with your account, you can directly click Save and Proceed.
Select a topic if you have multiple topics in your account and click Save and Proceed.
Click Add Subject. This section will expanded to show you the preheader option.Enter a subject line and add the pre-header text of the email. Click Save. Refer screenshot below.