This summary describes how to build fast GraphQL APIs with sub-second latency, reduce architecture complexity, and make engineering teams more efficient using Apollo GraphQL Federation and Cube's GraphQL API. The tutorial explains the challenges of data-intensive applications and how Apollo and Cube can help resolve these issues. It covers the key points of building an Apollo supergraph with Apollo GraphOS, federating queries from external services, and boosting query performance. The summary also highlights the benefits of using Cube's GraphQL API to accelerate analytical queries and provides resources for getting started with Cube Cloud.