What is the "delay" value for?

[cutty]

At the left side of the Blitzortung screen is a "delay" display, usually updating very quickly with values of a few seconds.  What is being displayed here and what purpose does it serve? Thanks.  Peter

That is the 'real  time' delay from the calculated stroke impulse discharge time-stamp to actual display on the map.  Fast, huh? Not quite 'instantly' but within a few seconds of when you could have seen the flash.
'reload after' is countdown to updating age (color code) of all strokes displayed.
'Lat - Lon' is the location of your cursor pointer on the map.