Where they come from
Go to Settings › Taxonomies to see each list.
Platform entries come with the app and can’t be changed. Entries tagged Yours were added by your team while picking a reason.
Add one
Add a new reason or tag while you pick one, for example when marking a creator as lost.
Tidy the lists
The client owner and brand managers can deactivate an entry or merge it into another.
An entry that has been used is never deleted. Deactivated, it stops being offered, and records keep it. Merged, its records move to the other entry. A merge can’t be undone.