1. Hangfire is a library for managing background tasks and jobs in .NET and ASP.NET applications. It allows scheduling of fire-and-forget jobs, delayed jobs, and recurrent jobs that run in the background. 2. Background tasks are common needs in applications like ecommerce systems for tasks like invoice generation, reporting, subscription renewals, and automated emails. 3. Hangfire provides a dashboard to monitor scheduled jobs and tasks across distributed servers. It can host background tasks on the web server or a dedicated background task server.