Dan
Just an fyi, it doesn’t allow you to edit tags in the GUI on a MIG instance, thus I was not able to do the action referenced at 7:35 in section 11.8
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11.8 lab at 7:35 not allowed to edit tags on mig instance
I was able to do the same via CLI with "gcloud compute instances add-tags frontend-ig-k3pq –tags open-ssh-tag" (note: your instance will have a different name)