Have you ever thought about a better user experience while using your Jira issues? Does all information stored in your issues have the same relevance to all your users? Should all your users see the same issue data?
Now thanks to Hidden Fields for Jira you will be able to show custom fields from your issues screen to some users while they are hidden for the rest of users. Show your data only to those users which needs it, don't bother other users with information that doesn't add value to them.
With Hidden fields for Jira, you will be able to select a group of users with permissions to see each custom field. Those fields will be hidden for other users from Jira issue screens, gadgets and filters.
Hidden fields for Jira should be used for user experience purposes only. You shouldn't use it for security purposes as long as advanced users would be able to retrieve field information using rest api calls or Jira issue/filter exports