Bug 402651

SUMMARY
A very common complaint I've seen regarding the organization of systemsettings5 is its discoverability for new users: what each setting does, the difference between each of them (for instance, Look and Feel/Desktop Theme/Widget Style/GNOME Application Style), what exclusive KDE Plasma features are there and what are they for (for instance, Activities, Window Rules, Web Shortcuts).

Given that: the first level of System Settings has tooltips/a description on mouse hover AND an option to enable/disable said tooltips through the Configure menu; the third level (KCMs themselves) of System Settings has unobtrusive tooltips in useful areas; the second level of System Settings has no tooltips; then descriptions could be added to the second level as tooltips on mouse hover for improving the discoverability of several features/settings.

(By levels I mean, for instance: the first level has Workspace Theme; when you click it, it shows the second level, containing Look and Feel, Desktop Theme, Cursor Theme and Splash Screen, together with the third level, which would be the KCM itself, regardless of being in sidebarview or treeview. I don't know the name for each one of these categories/groups/menus, sorry for that! I hope I was clear enough.)

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Solus 3.999
KDE Plasma Version: 5.14.4
KDE Frameworks Version: 5.53.0
Qt Version: 5.11.2