This is handy if you're making rounds selling to every single merchant in a town and don't feel like fast travelling across the map for whatever reason, and is especially handy for 'farming' items such as, for instance, filled soul gems from the various merchant/trainers in Winterhold. The Elder Scrolls Online: Morrowind – Where to Respec in Vvardenfell.
The Impresario is located at a special booth in Daggerfall in Glenumbra, Davon’s Watch in Stonefalls, and Vulkhel Guard in Auridon.