The source – yandex.ru
Yandex launched a new "Goods" tab in Yandex.Search. It is not visible to everyone, while this functionality is available in beta.
Goods in the section are presented with a photo, price and main characteristics. The principles of goods ranking in this tab are the same as in the main Search. The ranking is accurately affected by location, query, search behavior history, and page content.
Product listing starts automatically if the store has a YML feed uploaded to Webmaster.
How do I upload a feed to Webmaster?
Go to "Search submission" ⟶ "Product and offer data sources" and click on "Upload feed".
Select the category "Goods" and specify the desired region. Add a link to the YML feed with your products and click on "Done".
Go through the feed quality check and wait till the end of moderation. Usually validation takes from a few hours to two days, but in some cases the duration can be extended.
For more details see Yandex.