A headless WordPress site is one that uses WordPress for content management and another custom front-end stack to actually display that content to a site visitor.
To be able to better understand what is different about headless WordPress, we must have a look at what a headless content management system is in general. If you would like a more detailed explanation, check out our article on headless CMS, by clicking on the link: https://bit.ly/3uD7ttn
