The W3C (World Wide Web Consortium) is an international organization founded by Tim Berners-Lee in 1994, dedicated to creating and promoting web standards to ensure a consistent and high-quality web experience. The W3C focuses on developing technical standards and guidelines through a consensus-based process involving various stakeholders in the IT field. While W3C standards have advantages such as improved website maintenance and accessibility, the validation process can be time-consuming and incurs costs.