In what file and What line of code outputs Product Description?

[mk12]

In what file and What line of code outputs Product Description
in standard template and in monster's templates?

[kobra]

In what file and What line of code outputs Product Description
in standard template and in monster's templates?

I am guessing you are referring to a Template Monster template???
You will need to validate with them that they use the default code for product description....
For a default template it is in tpl_product_info_display.php and begins with bof product description and ends with the eof