What is the LibreCAD Splash Window

It is listed in Edit/Application Preferences.  What is it?

I have searched the User Manual, Googled it, turned it on and off, hovered the cursor over it hoping for some explanation..  I still have no idea what it is.

http://doc.qt.io/qt-5/qsplashscreen.html#details

ravas - thank you for the link - now I know.

Should this be explained in the User Manual, for the elucidation of other newbies?

My LibreCAD takes three seconds to load, and it then takes one second for my drawing to load.  Now that computers have got faster, isn't a Splash Screen for LibreCAD just un-necessary padding?

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In 2.1.0 I moved it to a new "Startup" section. The text now reads: "Display loading screen".