I have a lister with the tab "Audiobooks". There are also other tabs in the lister.
If I switch to one of them, then minimize the lister, and later want to return to the lister, I click the taskbar icon. But at this point I do not see "Audiobooks" on the list but the name of the last visited tab in the lister. If I have plenty of open listers, I do not know which of them contains "Audiobooks".
With the option to give a lister a custom name, the lister custom name would be displayed regardless of which/what named tab was recently visited. The name would be remembered until the lister is closed, and it would be saved along with the layout containing the lister.