Building Microservices API in Go - Refactor Error Handling

The video tutorial focuses on refactoring error handling in a web application. It begins by discussing the importance of sending error responses in JSON format for consistency. The tutorial then demonstrates how to eliminate duplicate error codes using structs and JSON tags. A new function, 'write response', is introduced to handle response writing, promoting code reuse. The video concludes with testing the refactored code and performing cleanup tasks.

What is the significance of handling all errors in the application?

Describe the changes made to the handlers in the refactoring process.

What assignment is mentioned for the next video after the refactoring?