If I change a Helper layout, will it change where it's used?
No. Helpers are coupled with the page once placed. Changes to the Helper layout will not affect existing instances.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
Yes, you can use Drupal fields in certain parts of Site Studio.
It depends on the use case. For fields and their field formatters use a 'Field' element, for data without field formatters, use a token.
This is because you have the page title block in the content region.
Yes, you can personalize content within Site Studio using the context module.
Running the composer update command will update any composer packages that have newer versions available.
This is due to a Drupal core bug.