Editing a page means the user is allowed or not to go to the page edit mode and edit/fill content of the widgets there. Modifying is the right to reorder pages and change their titles. To allow your users to only edit you should allow only one user role to do it when modifying page permissions ( page permissions can be inherited from parent page).
In order to send for approval you need to set up workflow
. This blog
explains how to get your workflow.
Hope this information was helpful.
All the best,
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items