The help just says "...you can use the jem Comments Plugin to show user comments..."
That's only half the needed instructions. It should also state that comments are not built into jem, you have to install jcomments.
At least I didnt't know
If you find JEM useful and if you use it on your site, please consider a donation to the project.
You are not logged in.
JEM and this site is not affiliated with or endorsed by The Joomla! Project™. Any products and services provided through this site are not supported or warrantied by The Joomla! Project or Open Source Matters, Inc. Use of the Joomla!® name, symbol, logo and related trademarks is permitted under a limited license granted by Open Source Matters, Inc.