Forms are guided questionnaires that you can build on top of your Merge turnsheets. Use them to give your colleagues or clients an easy way to generate a single suite of documents from your Merge sheet. They provide a simple, user-friendly frontend to your turnsheet, and are especially useful for templates and document automation.
Consider adding a form to your turnsheet when the people using it:
only need to create one set of documents at a time (i.e., if they were using the table, they would only fill out one row)
aren't familiar with the construction of your documents and wouldn't understand your column headings
shouldn't be making any changes to your table, only filling in information
are from outside your organization (you can share forms with anyone using a password-protected public link).
When someone completes your form, they will get a set of documents, and their responses will be added as a new row to your turnsheet, letting you keep track of all the responses over time and all the documents created.