Message queuing allows for asynchronous and decoupled communication between components or services. In ASP.NET Core Web API, you can implement message queuing using a message broker like RabbitMQ or Azure Service Bus. These message brokers provide reliable message storage and delivery mechanisms. You can publish messages to a queue or topic and have consumers process them asynchronously. By integrating with a message broker, your Web API can leverage the benefits of scalability, fault tolerance, and loose coupling that message queuing provides.