In this course, we're going to see how Apollo's powerful cache helps easily solve complex UI problems, such as pagination, handling loading and error states, optimistic updates, and minimizing network requests.
We'll start from the basics, and look at how to make queries and mutations, but then we'll look at how the cache is behind most of Apollo's immediate benefits. We'll explore in-depth how it works, how it stores data, and how we can manually modify it manually for advanced scenarios.
Even if your backend doesn't fully support GraphQL yet, we'll look at how to write GraphQL queries in your components that retrieve local client state under the hood - or that can even make REST API calls.
What you'll learn
Explore how to handle errors elegantly and watch out for edge cases
Understand how to store client-side state in the Apollo cache and why it's useful
Design apps that are resilient to slow and even occasionally offline networks
Homepage

https://egghead.io/courses/manage-state-in-react-apps-with-apollo-client-and-graphql-a45b3b89