Among the following functionalities, you will find it rather useful to have
You must choose at least one option
A content management system (CMS) would allow you to edit important parts of the application's static content without the intervention of a developer.
Account administrators could list users, add, delete, or suspend them.
Account administrators oversee content submitted by users for publication and have an approval flow.
Integrate your VoIP phones with your application and assist users by automatically displaying caller data and history (usually a customer).
Find out where your users come from and how they use your application. We recommend Google Analytics.
When things go wrong, you need to know, we recommend Sentry.
Provide support in multiple languages for your application and a knowledge base for documentation.
I don't have a precise idea.