Para adornar la pared.
Cita: W3Schools offers certifications whose value is highly debatable… No employers recognize or respect W3Schools certificates. Unlike Microsoft’s MCP or Cisco’s CCC, W3Schools has absolutely no authority over the technologies for which they claim to provide certification. Unlike CompTIA’s ANSI/ISO accredited certifications, W3Schools has no support from governing standards bodies.
De
w3fools.com
Ahí también puedes leer que esa web está llena de errores.
