While this step is not required for WooCommerce integrations, we highly recommend that you utilize CRONTAB instead of the default wp-cron. You can read a little bit more about CRONTAB here. In this article, we'll briefly summarize why we ask that you use CRONTAB.
The very basic summary is that CRONTAB makes your website load faster than wp-cron does! Because CRONTAB runs on your web server instead of through WordPress, it loads pages in (on average) roughly 0.3 seconds, while wp-cron can add up to a second to your load times. This may sound insignificant, but this time adds up!
wp-cron also only updates when there are users on your site, which can result in complications during low volume hours, and during development. wp-cron also halts any processes taking longer than 30 seconds, which can adversely affect your integration. CRONTAB will enhance the performance and reliability of your Modern Retail integration because the server will trigger the scheduled tasks instead of website visitors. We strongly recommend not using wp-cron.
Lastly, if you can't use CRONTAB (the most common reason for this being wp-engine), we recommend using Alternate Cron.
If you have any further questions, please feel free to get in touch with your Project Manager using the messaging feature in the Onboarding Center.