The logged item tab is where users can add items they would like to log data for. These will then show up every time users make new log entries (i.e. production usage). Users are required to add a name, data type, unit, and frequency. For more organization, users can group items together. Just select "Add a group" and name it.
The logged item will then show up when you add a log on your dashboard.
In order to group existing logged items, simply click on the dots on the left of the item name and drag it to the desired group.
Don't forget to click save at the bottom of the page!