Tactile enables custom vibration from apps. Phone has its own tactile thing, when clicking screen, ringing, alarm, etc. With Tactile installed and ON in CSSU, it adds vibration feedback in other areas, such as menus dropping down and going back up, popup windows. If you don't get tactile feedback from touching the screen, make sure it's on in settings. If you don;t get vibration from menus and prompts, make sure it's on in CSSU Tuner.