can i have an example of how to use web hooks for the match status

Webhooks are POST messages from FACEIT to your own server. You must configure a valid REST endopoint to receive Webhooks.

You need to create Webhook for your App and provide endpoint URL to your server.
When you want to get API result from other websites you call API.
But Webhook works differently. Webhook will send you live request to your endpoint URL. And than you can do with that data what you want.