MATERIAL DETERMINATION

Hi experts,

Iin material determination in the substitution reasons we have some options know

STRATEGY : B - GENERAL MATERIAL DETERMINATION WITH SELECTION AND WITH OUT....

OUT COME : B - PRODUCTS ARE DISPLAYED BUT ONLY WHEN CREATING THE ITEM IN THE SALES

kindly explain me these two options with an example

and in outcome if we leave blank: item will be replaced

then what will be the item category determination of substituted product

kindly explain