Why does Russia need black sea?

Domination of the Black Sea region is a geostrategic imperative for Moscow, both to project Russian power in the Mediterranean and to secure the economic gateway to key markets in southern Europe. The Black Sea Fleet has a long history, and is considered to have been founded back in 1783

For export? I asked about this but the answer was deleted.

I noticed too. Most answers were being deleted. Yes for business transactions.