HTML5, released by W3C in 2014, revolutionized web development with its robust features and cross-platform code portability, allowing developers to write code once and deploy it across all browsers. This iteration of HTML introduced native support for multimedia and interactive media, eliminating the need for additional plugins like Flash. It also added geolocation support, enabling websites to offer location-based services, and included new semantic elements, such as <audio>, <video>, and <canvas>, which enhanced the clarity and functionality of web content. Furthermore, HTML5 improved data storage options with application caches and web storage, and popularized long scrolling websites and parallax effects, making sites more engaging and compatible with mobile devices. As an open-source language, HTML5 has fostered a large global community, continuously evolving and offering new opportunities for developers.