On Google
Performance Max reads your product feed as its only brief.
A title that carries a product name and a size tells Google a name and a size. It does not say the concern, material or use a buyer actually types into search, so the product never enters those auctions and that demand goes to someone else.
QScale rebuilds each product's attributes, reads live demand from search, YouTube and Instagram, writes several titles and descriptions per product, tests them against each other, keeps the winners and writes them back into Merchant Center.