* { box-sizing: border-box; } body {margin: 0;}*{box-sizing:border-box;}body{margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;} A pingback in WordPress refers to an automated system where you get notified if someone links to one of...
WordPress Pingbacks: Everything You Should Know
* { box-sizing: border-box; } body {margin:...