When building APIs, understanding HTTP status codes is one of the most important fundamentals every developer should master. These codes are the standard way servers communicate the result of a client request, helping developers understand whether a request was successful, failed, or requires further action. HTTP status codes improve API communication by making responses predictable and easier to debug. Instead of returning vague responses, your API can clearly tell the frontend or client application exactly what happened. For example, when a request is successful, the server may return 200 OK, indicating that everything worked as expected. If a new resource is created, such as registering a new user or creating a blog post, 201 Created is the appropriate response. Authentication and authorization are also handled through status codes. 401 Unauthorized means a user is not authenticated, while 403 Forbidden indicates the user is authenticated but lacks permission to access a resource.…