Update 2022-07.md (#688)

Author: shell1

docs/whats-news/2022/2022-07.md

@@ -16,9 +16,12 @@ We're thrilled to have Charlie on board!
 
 ### Sticky Enrollment
 
-- When creating a new experiment, users can now opt for sticky enrollment (clients will not be unenrolled, even if the targeting becomes false, until the experiment ends). This information is now visible on the experiment’s "Details" page so that the user can review if they have opted for sticky enrollment.
+- When creating an experiment, users can now opt for sticky enrollment (clients will not be unenrolled, even if the targeting becomes false, until the experiment ends). This information is now visible on the experiment’s "Details" page so that the user can review if they have opted for sticky enrollment.
 
 - In addition to that, a new warning has been added when creating a new experiment. If an experiment is using a targeting configuration that requires sticky enrollment, sticky enrollment would be auto selected to support that targeting expression.
+- - Ex: if you target New Users, which is based on profile age, after a few days - they are not "New Users" anymore.  You do not want users to unenroll from the experiment - so that criteria has "sticky" defaulted.
+
+- The default is to not have this.   There are only a small set of cases where you are changing a pref that users may later change - and you don't want to unenroll them based on that choice. 
 
 ### Normandy