If you have any third-party integrations which you would like to sync with AT, for example: Zoho CRM or Mailchimp or any such platform, then the webhook has to be set for the AT records to be passed to the third-party software.
If Zoho is the third-party tool, then you might get the webhook URL and secret from the Zoho support team and add it here in the appropriate fields.
Choose the required action when an API call has to be made to the third party from AT. Say for example, if you choose subscription creation as the event, then whenever a subscription is created in AT, a call would be automatically made to Zoho and the created subscription entry would be updated on Zoho CRM.
From the third-party tool, we could set up any workflow like sending out welcome emails/ subscription activation emails as per our requirement.
Release Notes: June 13th, 2023
Webhook Event Configuration
Now outgoing webhooks can be configured for two additional events, namely, 'Subscription Attempt Initiated' and 'Subscription Attempt Failed'. These two webhooks will be applicable for all recurring and one-time plans.
The 'subscription attempt initiated' webhook will be triggered when a customer initiates a payment and the 'subscription attempt failed' webhook will be triggered when the subscription attempt fails due to payment and validation errors.
They can be configured in Accesstype by clicking on 'Configure' -> 'Outgoing webhooks' -> 'Add Webhook'

Release Notes: JULY 2019
What’s new
Webhooks Dashboard
AccessType uses webhooks to notify your application any time an event happens on your account. Webhooks added are subscription creation, cancellation, renewal, activation, expiry, expiry reminder, entered grace period and awaiting payment.

Improvements:
Set a low priority queue for webhook jobs
To ensure that the Outgoing webhooks does not interfere with other jobs and cause major performance issues we are giving low priority to webhook queue as opposed to the others which are set as High.