How to Enable Magento 2 Cronjob
Magento uses cron jobs for numerous features to schedule activities. To enable the cron job in Magento 2, log in to the server using SSH. Switch to the appropriate user if you are logged in as root. Now run command
php bin/magento cron:install
If you need to remove the cronjob, run
php bin/magento cron:remove
See Magento