Screen Space Shadows Renderer Feature

The Screen Space Shadows Renderer Feature calculates screen-space shadows for opaque objects affected by the main directional light and draws them in the scene. To render screen-space shadows, URP requires an additional render target. This increases the amount of memory your application requires, but if your project uses forward rendering, screen-space shadows can benefit the runtime resource intensity. This is because if you use screen-space shadows, URP doesn't need to access the cascade shadow maps multiple times.
Screen-space shadows in a sample Scene.

The screen-space shadows texture for the above image.

Enabling screen-space shadows

To add screen space shadows to your project, add the Screen Space Shadows Renderer Feature to the URP Renderer.

Viewing screen-space shadows in the Frame Debugger

After you enable this Renderer Feature, URP renders screen-space shadows in your scene. To distinguish between shadow map shadows and screen-space shadows, you can view the render passes that draws the shadows in the Frame Debugger.
Screen Space Shadows pass in frame debugger.

You can compare shadows cast on opaque objects from the screen-space shadow texture or the cascade shadow maps.
The Frame Debugger shows the screen-space shadows texture.

The Frame Debugger shows shadows from a shadow map.

Requirements and compatibility

This Renderer Feature uses a depth texture and invokes a depth prepass before it draws opaque objects. It calculates the shadows in screen space before the DrawOpaqueObjects render pass. URP doesn't calculate or apply screen-space shadows for transparent objects; it uses shadow maps for transparent objects instead.
The Frame Debugger showing that Unity uses shadow maps for transparent objects and screen-space shadows for opaque objects.