This is the 8793rd most frequent Russian word.
покровке
"Покровке" is the dative or prepositional case of "покровка," which can refer to "Pokrovka" (a street name or place) or something related to "covering" or "protection," depending on context.
In this sentence, 'Покровке' refers to the proper name of a street or place in a dative case after the preposition 'на' indicating destination.
Мы ходили на Покровке вчера.
We visited Pokrovka yesterday.
Here, 'Покровке' is used to denote a location in the dative case after 'на', describing where the shops are situated.
На Покровке много интересных магазинов.
There are many interesting shops on Pokrovka.
In this context, 'Покровке' is also in the dative case with the preposition 'по', implying movement along the street.