If you want your application to be notified about bookings tied to a particular scheduling link, you have to set up webhooks within that specific scheduling link's settings.
Visit your scheduling link page.
Click on Settings.
Click on Webhooks.
Click on Add New Webhook.
Add an endpoint that would support a POST request containing the payload.
Choose an event you want to subscribe to through this webhook.
Optionally, provide a secret to verify the request is from your Neeto product.
Click on Save Changes to create the webhook.
Once a webhook is created, the events that it subscribes to will start sending payloads to the endpoint specified in the webhook.