Hi Rahim,
WordPress uses a file called wp-cron.php as a virtual cron job, or scheduled task in order to automate things like publishing scheduled posts, checking for plugin or theme updates, sending email notifications and more.
By default WordPress is set up to call wp-cron.php every time someone visits your WordPress website when a scheduled task is present, to basically ask “is it time to do anything yet?”.
On low traffic sites this is perfectly fine, but when visitors roll in, checking multiple times for scheduled tasks can be very inefficient and lead to resource usage problems for your server, plus make your website load slower.
When you install Super Cache plugin the CRON jobs will be disabled to make your site load faster.
Please refer this topic for more https://www.inmotionhosting.com/support/website/wordpress/disabling-the-wp-cronphp-in-wordpress
Kind regards
Harry
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