HTML5 is a new markup language that provides a simpler format for webpages and applications that is more adaptable to different devices like tablets, laptops and smartphones. It allows content to be delivered seamlessly across different platforms without compatibility issues. While HTML5 is still being developed, many publishers are beginning to use it to future-proof their content delivery and access new revenue opportunities. Outsourcing HTML5 conversion to a company with expertise like SPi Global ensures the process is handled strategically and efficiently.