Guidelines for Using Handlebars Merge Language in Account Engagement

When using Handlebars Merge Language (HML) merge fields to personalize content in Account Engagement, keep these guidelines in mind.

Available in: All Account Engagement Editions

HML is available for email templates, list emails, 1:1 emails, dynamic content, landing pages, forms, and user signatures. In Salesforce, HML is available for Engage emails.
Emails and email templates can have up to 200 HML merge fields and 10 pieces of dynamic content.
If a prospect’s record doesn’t have a value for a field, nothing is displayed. To avoid empty fields, define default values for fields, or use HML’s conditional logic statements to create alternative content.
If you specified a default value for a field and set up a conditional merge field statement, the default value populates instead of the statement.
You can't use custom fields that record and display multiple responses as HML merge fields. Those fields also don’t appear in the merge field picker when you build content.
You can use a standard multi-select or a checkbox field as a merge field. The value displayed is the last value listed for that field in the prospect’s record.
To use merge fields in email subject lines, use the Advanced Subject Composer in your email draft.
When a prospect clicks the view online link in an email, the merge fields populate with the values that are on the prospect's record at that moment.
If you include a merge field in a URL, the data populates at the time that the prospect clicks the link.

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