Update convdev.md for clarity

Clarified how instance statistics are presented.

doc/user/instance_statistics/convdev.md

@@ -2,25 +2,27 @@
 
 > [Introduced][ce-30469] in GitLab 9.3.
 
+NOTE: **NOTE**
+Your GitLab instance's [usage ping][ping] must be activated in order to use this feature.
+
 The Conversational Development Index (ConvDev Index) gives you an overview of your entire
 instance's adoption of [Concurrent DevOps](https://about.gitlab.com/concurrent-devops/)
-from planning to monitoring. It displays the usage of these GitLab features over
+from planning to monitoring.
+
+This displays the usage of these GitLab features over
 the last 30 days, averaged over the number of active users in that time period. It also
 provides a Lead score per feature, which is calculated based on GitLab's analysis
 of top-performing instances based on [usage ping data][ping] that GitLab has
-collected. Your score is compared to the lead score, expressed as a percentage.
-Your overall index score is an average of all your feature score percentages.
+collected. Your score is compared to the lead score of each feature and then expressed as a percentage at the bottom of said feature.
+Your overall index score is an average of all your feature score percentages - this percentage value is presented above all the of features on the page.
 
 ![ConvDev index](img/convdev_index.png)
 
 The page also provides helpful links to articles and GitLab docs, to help you
 improve your scores.
 
-Your GitLab instance's [usage ping][ping] must be activated in order to use this feature.
 Usage ping data is aggregated on GitLab's servers for analysis. Your usage
-information is **not sent** to any other GitLab instances.
-
-If you have just started using GitLab, it may take a few weeks for data to be
+information is **not sent** to any other GitLab instances. If you have just started using GitLab, it may take a few weeks for data to be
 collected before this feature is available.
 
 [ce-30469]: https://gitlab.com/gitlab-org/gitlab-ce/issues/30469