GraphQL in action: How Netflix used GraphQL for its marketing tech team
Netflix relies on an internal publishing platform known as Monet for managing its marketing and external ad campaigns. Their goal as one of the most notable personalization companies in the world was to make their ads resonate with their users.
Before adopting GraphQL, their React UI layer used a REST API. As their use cases grew more complex, browsers would fetch more data than could be used. Also, their data structures were becoming increasingly more graph-oriented.

(Image credit: The Netflix TechBlog)
To help solve its network bandwidth bottlenecks, Netflix adopted a GraphQL API. Some of the other benefits the company discovered were that by only selecting the data that was necessary during client requests, they were able to redistribute loads and optimize payloads. Also, development cycles became simplified thanks to the declarative data fetching of GraphQL. It also made the React components of the user interface easier to understand