You can ues it to store data of your addon, for different purposes, like this
Or e.g. to split your savedvars into "general fixed settings" and "floating data during gameplay" if the adodn needs base setitngs and collected data form inventories e.g.
e.g. "base data": save settings acocunt wide or per character?
"settings": accout wide/character settings for the addon
"floating data": marker icons, inventory information, worldmap positions, etc.