Add use cases for issues-related EE features

doc/user/project/issues/csv_export.md

-# CSV Export
+# Export Issues to CSV
 
-> [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1126) in [GitLab Enterprise Edition Starter](https://about.gitlab.com/products/) 9.0.
+> [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1126) in [GitLab Enterprise Edition Starter 9.0](https://about.gitlab.com/2017/03/22/gitlab-9-0-released/#export-issues-ees-eep).
 
 Issues can be exported as CSV from GitLab and are sent to your default notification email as an attachment.
 
+## Overview
+
+**Export Issues to CSV** enables you and your team to export all the data collected from issues into
+a **[comma-separated values](https://en.wikipedia.org/wiki/Comma-separated_values)** (CSV) file,
+which stores tabular data in plain text.
+
+> _CSVs are a handy way of getting data from one program to another where one program cannot read the other ones normal output._ [Ref](https://www.quora.com/What-is-a-CSV-file-and-its-uses)
+
+CSV files can be used with any plotter or spreadsheet-based program, such as Microsoft Excel,
+Open Office Calc, or Google Spreadsheets.
+
+## Use cases
+
+Among numerous use cases for exporting issues for CSV, we can name a few:
+
+- Make a snapshot of issues for offline analysis or to communicate with other teams who may not be in GitLab
+- Create diagrams, graphs, and charts from the CSV data
+- Present the data in any other format for auditing or sharing reasons
+- Import the issues elsewhere
+- Long-term issues' data analysis with multiple snapshots created along the time
+- Use the long-term data to gather relevant feedback given in the issues, and improve your product based on real metrics
+
 ## Choosing which issues to include
 
 From the issues page you can narrow down which issues to export using the search bar, along with the All/Open/Closed tabs. All issues returned will be exported, including those not shown on the first page.

doc/user/project/issues/index.md

@@ -5,13 +5,13 @@ for tracking the evolution of a new idea or the process
 of solving a problem.
 
 It allows you, your team, and your collaborators to share
-and discuss proposals, before and while implementing them.
+and discuss proposals before and while implementing them.
 
 Issues and the GitLab Issue Tracker are available in all
 [GitLab Products](https://about.gitlab.com/products/) as
 part of the [GitLab Workflow](https://about.gitlab.com/2016/10/25/gitlab-workflow-an-overview/).
 
-## Use-Cases
+## Use cases
 
 Issues can have endless applications. Just to exemplify, these are
 some cases for which creating issues are most used:
@@ -23,7 +23,28 @@ some cases for which creating issues are most used:
 - Obtaining support
 - Elaborating new code implementations
 
-See also the blog post [Always start a discussion with an issue](https://about.gitlab.com/2016/03/03/start-with-an-issue/).
+See also the blog post "[Always start a discussion with an issue](https://about.gitlab.com/2016/03/03/start-with-an-issue/)".
+
+### Keep private things private
+
+For instance, let's assume you have a public project but want to start a discussion on something
+you don't want to be public. With [Confidential Issues](#confidential-issues),
+you can discuss private matters among the project members, and still keep
+your project public, open to collaboration.
+
+### Streamline collaboration
+
+With [Multiple Assignees for Issues](multiple_assignees_for_issues.md),
+available in [GitLab Enterprise Edition Starter](https://about.gitlab.com/gitlab-ee/)
+you can streamline collaboration and allow shared responsibilities to be clearly displayed.
+All assignees are shown across your workflows and receive notifications (as they
+would as single assignees), simplifying communication and ownership.
+
+### Consistent collaboration
+
+Create [issue templates](#issue-templates) to make collaboration consistent and
+containing all information you need. For example, you can create a template
+for feature proposals and another one for bug reports.
 
 ## Issue Tracker
 
@@ -102,8 +123,14 @@ Multiple Issue Boards enables you to create more than one Issue Board per projec
 It's great for large projects with more than one team or in situations where a
 repository is used to host the code of multiple products.
 
-[Multiple Issue Boards](../issue_board.html#multiple-issue-boards)
-are available only in [GitLab Enterprise Edition](https://about.gitlab.com/gitlab-ee/).
+_[Multiple Issue Boards](../issue_board.html#multiple-issue-boards)
+are available only in [GitLab Enterprise Edition](https://about.gitlab.com/gitlab-ee/)._
+
+### Export Issues to CSV (EES/EEP)
+
+Issues can be [exported as CSV](csv_export.md) from GitLab and are sent to your email as an attachment.
+
+_Exporting issues to CSV is available only in [GitLab Enterprise Edition](https://about.gitlab.com/gitlab-ee/)._
 
 ### Issue's API
 

doc/user/project/issues/issues_functionalities.md

@@ -43,8 +43,6 @@ assigned to them if they created the issue themselves.
 
 ##### 3.1. Multiple Assignees (EES/EEP)
 
-Issue Weights are only available in [GitLab Enterprise Edition](https://about.gitlab.com/gitlab-ee/).
-
 Often multiple people likely work on the same issue together,
 which can especially be difficult to track in large teams
 where there is shared ownership of an issue.
@@ -52,9 +50,7 @@ where there is shared ownership of an issue.
 In GitLab Enterprise Edition, you can also select multiple assignees
 to an issue.
 
-> **Note:**
-Multiple Assignees was [introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/1904)
-in [GitLab Enterprise Edition 9.2](https://about.gitlab.com/2017/05/22/gitlab-9-2-released/#multiple-assignees-for-issues).
+Learn more on the [Multiple Assignees documentation](multiple_assignees_for_issues.md).
 
 #### 4. Milestone
 

doc/user/project/issues/multiple_assignees_for_issues.md

+# Multiple Assignees for Issues
+
+> **Note:**
+[Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/1904)
+in [GitLab Enterprise Edition Starter 9.2](https://about.gitlab.com/2017/05/22/gitlab-9-2-released/#multiple-assignees-for-issues).
+
+## Overview
+
+In large teams, where there is shared ownership of an issue, it can be difficult
+to track who is working on it, who already completed their contributions, who
+didn't even start yet.
+
+In [GitLab Enterprise Edition](https://about.gitlab.com/gitlab-ee/),
+you can also select multiple assignees to an issue, making it easier to
+track, and making clearer who is accountable for it.
+
+![multiple assignees for issues](img/multiple_assignees_for_issues.png)
+
+## Use cases
+
+Consider a team formed by frontend developers, backend developers,
+UX designers, QA testers, and a product manager working together to bring an idea to
+market.
+
+Multiple Assignees for Issues makes collaboration smother,
+and allows shared responsibilities to be clearly displayed.
+All assignees are shown across your team's workflows and receive notifications (as they
+would as single assignees), simplifying communication and ownership.
+
+Once an assignee had their work completed, they would remove themselves as assignees, making
+it clear that their role is complete.
+
+## How it works
+
+From an opened issue, expand the right sidebar, locate the assignees entry,
+and click on **Edit**. From the dropdown menu, select as many users as you want
+to assign the issue to.
+
+![adding multiple assignees](img/multiple_assignees.gif)
+
+An assignee can be easily removed by deselecting them from the same dropdown menu.