This is the location for all files not requiring precompilation. This includes files that may be minified as part of a production build (e.g., HTML, JSON, images), but otherwise require no additional preprocessing; i.e., they could be served directly if needed.
Note: This includes files that may be dynamically compiled or preprocessed by the server at runtime (e.g., ASP.NET files). These files may not traditionally be thought of as "static", but they are in context of the build process.