From within your pipeline, you can hide columns of information from being viewed by your end users.
To hide a column:
Go to the pipeline of your form and hover your mouse over the name of a column; a green eye will appear.
2. After clicking on the eye, the entire column will become grey and the eye will appear red with a slash through it.
For the end user, the column simply will not appear in the live or public view of the pipeline.