Should buttons be on left or right?
Are the buttons on your shirt on the left side or on the right? There's actually a pretty easy answer: if you wear women's clothing, the buttons are on the left side of the shirt. However, if you wear men's shirts, the buttons line up on the right side.
What is a button label?
Button labels inspire the users to take an action. To indicate what a button will do, use the function as the label of the button. When users read the button labels like Save, Preview, and Publish, they know exactly what the button will do when pressed.