Sitecore Headless Development
Develop decoupled applications using Sitecore data
Sitecore provides a suite of services, APIs, and software development kits (SDKs) that allow you to develop decoupled applications using Sitecore data, transforming Sitecore into a headless content management system (CMS).
Refer to the following documentation for more details:
If you are new to Sitecore, you might find it helpful to read Content authoring concepts for developers new to Sitecore.