This is the 5028th most frequent Russian word.
марки
"Марки" in English means "stamps" (as in postage stamps).
Here, 'марок' is the genitive plural form of 'марка', meaning 'stamp', referring to postage stamps used for mailing.
Я собрал коллекцию старинных марок.
I have collected a collection of antique stamps.
Here, 'марки' refers to 'brands', indicating the branding or make of the tires.
На этой машине стоят зимние марки шин.
This car is equipped with winter tire brands.
In this sentence, 'марок' is the genitive plural form of 'марка', meaning 'brand', referring to the names or trademarks of goods.