Automatically Calculating Margin

So, what happens when we set the margin to "auto"?

Auto means 'automatically calculate the margin.'

For example, if you set margin: auto;, it will automatically calculate the left and right margins to be equal, centering the element within its container. This is a common CSS technique for centering elements on a page.

Note that you cannot use the auto value for padding. padding: auto; is not a valid CSS rule.

Padding deals with the internal space of an element, and that internal space is usually determined by the element's size or content.