Does Low Res Transparency do anything?

I'm going through tweaking various settings, and I'm confused by Low Resolution Transparency. Maybe this only applies to certain flavors of transparent objects, but I'm not seeing any impact of enabling of disabling this. I expected that looking through transparent objects would look worse/pixelated with this turned on, but it doesn't look any different.

Is that not what this does? Performance wise, since I can't see a visual difference, is it better to enable or disable this feature?

 

You can clearly see it on particles from vfx graph when they intersect geometry

 

Okay, thanks. I'll try putting different stuff behind the glass to see what this effects.