The Belightful Butterfly Oasis should be placed in a sunny place, so that butterflies will come feed from it. Butterflies are exothermic and they yearn for warmth while sipping sweet nectar.
Not only to optimize the attractiveness for butterflies but also your own observing experience, it is recommended to place the feeder in a peaceful place.
Also consider placing your feeder somewhere at the eye-height or little a bit higher so that the scent of nectar is able to spread around along with the wind, and that cats won’t be able to scare the butterflies away.
Avoid placing the feeder near (open) windows or doors, as butterflies stray easily indoors.