Being the geographical and economic center of upper Trifylia, Kopanaki is well known for "pazari" (bazaar) or "agora", that takes place in the central square every Sunday since 1900 and attracts further population.

The messenian tradition of baking "gournopoula" (pork) and selling it on the edge of the street started from this location, initially only on Sundays, for the visitors from far away, so they could have a hearty meal and the power to do the return trip.

Today in many places of the region lying on main road someone can find (no matter the day) grilled gournopoula.

Kopanaki is situated in the valley of a tributary of the small river Peristeri, between Tetrazio and Kyparissia mountains.

It is situated on the main road from Pyrgos and Kyparissia to Kalamata and on the metre gauge railway from Kalonero to Zevgolateio.