googletag.cmd.push(function() { googletag.display(‘div-gpt-ad-1705321608055-0’); });

Does anyone know anything about calibration methodology?

default-16x9

As part of a team we have been assigned a task of putting together a calibration piece with regard to call taking, and we require any assistance that anyone can offer, from research sources to methodology to history to actually putting the piece into practise.
Thankyou in advance.
Paula Rooney