Why would you use a custom Rendering Contents Resolver with a JSON rendering?

Using a custom Rendering Contents Resolver with a JSON rendering is particularly beneficial because it allows for more complex data access from within Sitecore. This capability is essential when dealing with scenarios where the data requirements exceed basic content retrieval. A custom resolver can facilitate the integration of various data sources, support advanced data structures, or accommodate specialized content models, thus enabling developers to construct sophisticated components that meet complex business requirements.

This flexibility makes it easier to manipulate and present data dynamically in a manner that aligns with the unique needs of a project, maximizing the effectiveness and versatility of the content delivery system. The ability to handle intricate data interactions is a significant advantage provided by implementing a custom resolver tailored to specific use cases in JSON rendering contexts.