How can I categorize/analyze my form fields?

Could this support the use of categories for question. Allowing me do analytics of same. E.g. I have ten questions 5 is about security and 5 is about delivery. At end i want to see how best they did in both areas

I'm not sure what sort of categories you're looking for but our Form Analytics feature should allow you to keep track of which form performs the best.

Complete guide: Understanding-Form-Analytics-and-Ways-on-How-to-Get-Your-User-s-Info 

If you need to analyze a specific form on a field or question level, then generating reports for them can be beneficial. We offer a plethora of reports that you can choose from so feel free to pick one that will suit your needs.

Related guide: How-to-Create-Form-Reports-in-JotForm