As an Org Admin it would be helpful to be warned that emails will be sent to users once the domain is claimed/verified.

Adding to our documentation on Organization Administration: https://confluence.atlassian.com/cloud/organization-administration-938859734.html

Suggest adding a note that upon completing step 4, emails will be generated:

4. Verify your ownership of one or more domains to manage the Atlassian accounts that use email addresses with those domains.

As well as our documentation on Domain Verification:
https://confluence.atlassian.com/cloud/domain-verification-873871234.html

Suggest adding a note around where it says:

All the Atlassian accounts with email addresses from those domains become managed by your organization.