How to Update to iOS 9.3.3 iPod touch

How to update to the latest iOS 9.3.3 in your iPod touch , also for your iPhone Se, iPhone 6S, iPhone 6Splus, iPhone 6, iPhone 6plus, iPhone 5S, iPhone 5C, iPhone 5 ,iPhone 4S, iPhone 4, iPhone 3GS, iPod touch, 16gb, 8gb, 32gb, 64gb, 128gb, 256gb, smart phone, iPod touch , ipad mini2, iPad mini3 , iPad mini1, iPad mini4, Ipad air2, iPad air, iPad 1, iPad 2, iPad 3, iPad 4, apple phone, iPad Pro, iPad Pro2, iPod 6, 8gb, 16gb, 32gb, 64gb, 128gb, iPad Air 2, Silver, Gold, Space Gray, Rose