When delegating access permissions to another user, you are granting another individual from your org access to your Windmill account.
Delegated users will have access to everything the original employee has access to in Windmill. However, this will not alter Privacy settings for Google meetings or Google Docs. If a user doesn't have access to a Google Doc or Google meeting, they still won't have access or visibility within Windmill.
Delegating access to another user will take about an hour to go into effect. Only Windmill Admins have the ability to add or edit delegated users.