You can use the Documentation field of the alert policy to include any of the following. The Documentation section will always be included in your notification, regardless of the channel type. (1) dynamic labels (2) Playbook links -- internal playboo...

Unfortunately it's not possible to customize the contents of the notification body. With that said, coming in 2023 you'll be able to customize the subject line and we can share more in this thread when it's available. Stay tuned.

This is now possible through the API, you can reference the log data dynamically in the notification payload: https://cloud.google.com/logging/docs/alerting/log-based-alerts#lba-by-api

You can select the Pub/Sub notification channel and then send the alert policy to any 3rd party application. Here is a a blog post that walks through the example: https://cloud.google.com/blog/products/operations/pub-sub-webook-and-slack-notification...