Padding:-

The space between the Content box and the border box is called Padding.

Border:-

The space between the Padding box and the margin is called Border.

Margin:-

The space between the Border box and the Parent box Or HTML Web Page is called Margin.

  .container{
        width : 500px;
        height: 500px;
        background-color: aqua;
        margin-left:  10rem;
      }
      .button{
        padding: 1rem;
        border : 10px solid green;
        background-color: lightgreen;
        margin-left : 10rem;
        margin-top: 2rem;
      }


      <div class="container">
        <button class="button">Submit</button>
      </div>

Output:-