So that you can use both your hands easily for all the keys on the keyboard. For example, Alt A, will be used by pressing Alt with your right hand, and A with your left hand. Same logic for Alt L.
What are the two special keys in keyboard?
Special Keys: Keyboard has more special keys such as Space bar Key, caps lock key, backspace key, shift key, enter key, symbol keys and tab key etc.
What are the two shift keys?
The Shift key ⇧ Shift is a modifier key on a keyboard, used to type capital letters and other alternate "upper" characters. There are typically two shift keys, on the left and right sides of the row below the home row.