What is Queueable Apex?

Queueable Apex allows you to submit jobs for asynchronous execution, similar to Future methods, but with additional benefits. These benefits include the ability to chain jobs, use non-primitive data types, and monitor job progress. Queueable Apex is commonly used for long-running operations, integration with external systems, and complex calculations that don't need to be performed in real time. It's also helpful for circumventing governor limits by breaking down large processes into smaller, asynchronous units.