What is function key in computer

The keys from F1 to F12 at the top of the keyboard of computers and laptops are called function keys, their use is different in each software. In today's time computers and laptops have become essential devices, whose We need daily, through these devices we make most of our work easy, which saves time and money, for this computer and laptop should be used well, to operate it, you need to use function keys. Must be knowledgeable about the subject which makes it very easy to work