How to grant a user edit permissions on a single page

i would like to allow certain users to edit the content (update permissions) for certain pages only, and not any others. how can this be done?

Hi and welcome!

Did you read the parts of the documentation about this? They are a bit scattered and not always linked together:

• Require special permissions to view one or more pages
• Groups and Permissions
• Adding and Managing Users

Hope that helps. Let us know if you are still confused.