View the original community article here
Last tested: Nov 6, 2019
Hidden parameter is used to hide fields from explore field picker, doesn't hide hidden field in Custom Filters
The purpose of a hidden parameter is to make a field available for modeling but not available to end users. However, if end-users are using custom filters in the UI, they will have access to hidden dimensions.
Docs go into the hidden parameter in more detail
This content is subject to limited support.