This is the 2096th most frequent Turkish word.
ürünlerin
"Of the products" or "products'" (possessive form).
Here, 'ürünlerin' is in the genitive/possessive form (products' or of the products), describing ownership or relation.
Marketin raflarında ürünlerin çeşitliliği dikkatimi çekti.
The variety of products on the market's shelves caught my attention.
In this case, 'ürünlerin' is used again in genitive form to refer to the quality belonging to the products.
Ürünlerin kalitesini test etmek için bunları laboratuvarda analiz ettik.
We analyzed the products in the laboratory to test their quality.
'Ürünlerin' here describes association of prices to the products, again utilizing genitive construction.