How to schedule a CRON job to run a script on Ubuntu 20.4.1

The Cron is a Scheduling daemon that executes tasks at specified intervals. It reads the crontab (cron tables) for predefined commands and scripts.
For more explanation on this video: https://www.linuxhelp.com/how-to-schedule-a-cron-job-to-run-a-scripts-on-ubuntu-20-4-1

Source: https://www.youtube.com/watch?v=fv-VXcovTj4