URP draws objects in the DrawOpaqueObjects and DrawTransparentObjects passes. You might need to draw objects at a different point in the frame rendering, or interpret and write rendering data (like depth and stencil) in alternate ways. The Render Objects Renderer Feature lets you do such customizations by letting you draw objects on a certain layer, at a certain time, with specific overrides.
For examples of how to use Renderer Features, refer to the Renderer Features samples in URP Package Samples.
To add a Renderer Feature to a Renderer:
In the Project window, select a Renderer.
The Inspector window shows the Renderer properties.
In the Inspector window, select Add Renderer Feature. In the list, select a Renderer Feature.
Unity adds the selected Renderer Feature to the Renderer.
Unity shows Renderer Features as child items of the Renderer in the Project Window: