Talk - Advanced Inline Comments is the Сonfluence app that enables you to insert inline comments and suggestions on Confluence pages. 

• Inline Comments build up discussions that can be completely removed from pages once the discussed issue is solved. You can also archive and restore archived discussions. The mentions feature helps you get your colleagues involved in discussions.
• Suggestions let users propose changes and have page owners decide whether they will be accepted.

You can use inline comments and suggestions even when editing a page. It is also possible to set viewing permissions and control who will see comments and suggestions. Another useful capability is Talk Report, which helps you see all inline comments and suggestions in one place and monitor their resolution.