More and more businesses are using Headless CMS for web development, so here are some resources to explain what it is and how you can use it...
Still unsure? Check out this article on What is Headless CMS...
Here are some examples of Headless CMS for you:
Here is How to Build a Headless CMS site:
Here is some options to use for your Headless CMS and the most popular ones being used at the minute: