Title missing primary keyword in first 80 characters
Amazon's A10 algorithm gives significant weight to keyword presence in the listing title — especially in the first 80 characters, which are the portion displayed in mobile search results. Most Amazon.com sellers write titles that lead with brand name and product line rather than the primary keyword their buyers search. A title that doesn't front-load the primary search term loses ranking ground on the world's most competitive product search engine from the first character.