Hi @zakaria2790,
Newbies are always welcome. A Webhook is an event notification sent to a URL of your choice. Users can configure them to trigger events on one site to invoke behavior on another. So say you have a separate inventory manager. You could use a webhook to notify a URL that this service listens to that an order has taken place so stock can be adjusted. It’s a “post” notification.
https://docs.woocommerce.com/document/webhooks/
WooCommerce has a REST API that’s built-in that you can use to work with Order Notes. You can find the specifications about working with Order Notes here:
https://woocommerce.github.io/woocommerce-rest-api-docs/#order-notes
It has sample requests and sample objects that you can use in setting things up.
