/cron folderThis folder holds the cron jobs, i-e: jobs that are typically scheduled to be run on a regular basis (every hour, every day...).
Currently, you need to refer to your hosting provider in order to set up automatic calls to the jobs inside of this folder.
You may also use a watchdog service which will ping the files in this folder periodically to achieve the same goal.
Depending on how you set up your cron processor, this folder may or may not need to be accessed through the web.