We have a huge list of web part properties which have been defined by microsoft.
you can have a look over these properties from the link below: Share Point Web part properties Now once i ran into a situation wherein i had to change the "Chrome Type" property of a web part in the landing page of all the subsites as well as root site in my site collection. So in order to do this through User Interface would have required a considerable amount of time.
'Active Task' features includes: Easy task-based configuration; task settings automatically saved for repeated execution.
Optional user home directory creation and security settings.
However, this approach is inefficient and too time consuming (especially when dealing with thousands of profiles).
This is to prevent the user profile import process from overriding any information which an end user has already updated.
Additionally, the import only allows custom properties that are not active directory core properties.
These must be synchronized to Azure Active Directory.
For the list of these core directory properties, see the table listed in the FAQ section below.