What are you talking about?
When you are automating a certain process or site in SharePoint, sometimes you want to hide some fields. Let me give you an example:
I have a list to keep track of a process, say an RFP.
I can enter a new RFP, but when I create a new one, I don’t know the opening date, closing date or final date. Those fields are filled in via a workflow.
So if I don’t need to fill to them, why show them ? It would be better to hide those fields on my newform.aspx.
So how does this work ?
You add a new Content Editor webpart on your page and insert the script in the html source.
Link the script source to your Jquery script (that you have uploaded somewhere in a document library)
Now just fill in the field titles of the fields you want to hide.