This photo is of, to my understanding, the interior of a Soviet grocery store chain. The chain was called "Universam", and to my understanding it was a large supermarket store (not too unlike a modern Walmart in America I suppose) that would have been carrying most things you would have wanted to buy.
More info:
https://www.youtube.com/watch?v=dAA9w8YXL4o
https://englishrussia.com/2011/01/16/soviet-reality-that-seems-never-existed/