What happens if there is no value mapped for a field?

What happens if there is no value mapped for a field?

If your field value is blank, then the merge tag can be replaced with the text you provide with the merge tag using a pipe ( | ) symbol. You can use this in any predefined merge tag to avoid your merge tag being replaced with a blank space if a contact field has no value in it.
Learn more about Merge tags in Zoho Marketing Automation