SummaryCompaniesAmazon aims to keep shoppers from researching products on Google, forums and brand sitesInternal document says flawed AI answers and high costs make richer catalog data criticalPeople familiar with the matter say broader product database could blunt AI shopping agents and safeguard ad revenueSAN FRANCISCO, Nov 13 (Reuters) - Amazon (AMZN.O), opens new tab has a secret plan to ensure shoppers never need to leave its site: own the world’s product information.Called World Product Gr...