You may have used other  state management libraries like redux or something else, and you've certainly realized that one of the biggest challenges in your react applications is state management, and the questions that arise are:

• How to efficiently manage asynchronous operations?

• How to efficiently manage data caching?

• How do I make my application's data reflect the server state?

• How can I optimize performance while saving bandwidth?

• How do I update my data in the background to enhance the user experience?

There are many other questions, but this gives you an idea of the challenges you're constantly facing, and unfortunately, you end up writing a lot of code, sometimes very difficult to maintain afterwards, that doesn't entirely solve the real problem.

This is where react-query comes to save your life in your react projects. Hundreds of lines of code are replaced by 2 or 3 line configurations that solve the problem as efficiently as possible.

You can now delegate all operations related to asynchronous calls to react-query.

This course will give you the basics you need to know how to handle react-query and then you can explore its rich documentation to discover even more depending on your use case.

As said in the official document : "React Query is often described as the missing data-fetching library for React, but in more technical terms, it makes fetching, caching, synchronizing and updating server state in your React applications a breeze.

The way you build react applications, you don’t use an opinionated fashion for operations like fetching or maybe updating to making sure that  data that is consumed by your components reflects data that is in the server.

In order to solve these problems developers end up building some kind of workaround that has some consequences like touching component-based state and effect and making use of react build-in hooks or even using libraries like redux for global state management in order to try  to store and provide some asynchronous data in their react applications.