What is the use of memory QVL

This is something you must have seen on the official website of a motherboard manufacturer, QVL is an acronym for Quality vendor list, which translates to "Qualified Vendor (Product) List". But this abbreviation QVL, in other aspects have also been used. For example, the extension ".qvl" is used for a certain video format; product names, such as NAS network storage "Bafaleo LS-QVL" and "Daikin Air Conditioner FHYC125BQVL ". Its trailing letters indicate that some of the product function code and so on.