Read this article if you want to avoid line breaks when there is no data for a merge tag!
To indicate Publigo to skip an empty value, simply add your markers in a table.
Click on Insert, Table and add as many rows as you need for your merge tags:
Insert your markers in the table cells:
Hide the table by setting the border color to white:
Your template is ready!
Now, if Publigo doesn't find any value for a merge tag, the cell will be automatically skipped without any line break: