Why CRON setup is essential in Magento?

In order to avoid any undesired load to your servers, while looking for updates of any sort, Tagalys seeks for these updates in your Magento system when the predefined CRON runs. The CRON is a schedule set up by the admin of your online store. We rely on the CRON setup by the system admin to seek updates from Magento to Tagalys.