The product title is the single highest-leverage field in Shopping
Of everything in a Shopping feed — images, descriptions, attributes, pricing, GTINs — the product title drives the most performance. Google uses it as the primary relevance signal for query matching and a major input into CTR. A title of "Blue Running Shoes" performs dramatically worse than "Nike Pegasus 41 Men's Running Shoe, Royal Blue, Size 10," even if the same product is being sold. The structure matters: brand early (drives brand-bidder traffic), product type (category matching), key attributes (differentiation), variant details (variant-specific search matches). A supplemental feed lets us rewrite titles without touching the store's inventory management system — a meaningful tactical advantage when the default feed output is weak.