Cron is a utility used to schedule time-based jobs, enabling them to run automatically at a certain date or time. Cron expressions are strings used to define the schedule upon which a task should be executed. There are various ways to use cron to get daily tasks up and running, including running locally with crontab on Unix systems, using Windows Scheduled Tasks, cloud servers such as AWS EC2, Google's Compute Engine, DigitalOcean Droplets, Azure Virtual Machines, and other infrastructure services, cloud functions like Azure Timer Triggered Functions, AWS Lambda with CloudWatch, and cloud triggers. Each method has its pros and cons, and developers will have different preferences based on their needs.