It is an all-encompassing tool that provides sellers with all the data to be successful. However, with all of that information comes a responsibility. Since Walmart’s Retail Link® System is so comprehensive, Walmart holds its suppliers accountable for managing their inventory. A well-maintained inventory is one of the keys to being a successful seller on Walmart. If products are constantly out of stock or not available at key times, like grills during the summer, Walmart may want to part ways.