https://techcrunch.com/2019/04/11/walmart-acquires-ad-tech-startup-polymorph-labs-to-scale-up-its-ad-business/

Amazon has a large and growing advertising business, but rival Walmart’s own ad business is much smaller. It’s now working to change that. Earlier this year, the retailer consolidated ad sales for its stores and websites and said it was ready to start monetizing its shopper data on a grander scale. Today, its efforts continue as Walmart says it has bought the advertising technology company, Polymorph Labs, to help it better compete via online digital ads, targeted using shopper data.

Terms of the deal were not disclosed.