Walmart is one of the most popular companies on Black Friday. During Black Friday, it has more than 6 million page views per minute. Walmart adopted to microservices architecture to adopt to the world of 2020 to have 100% availability with reasonable costs. Migrating to microservices gave a huge uplift to the company. Conversion rates went up by 20%. They have zero downtime on Black Friday. They saved 40% of their computational power and got 20-50% cost savings overall.