SmartBox is the main feature of Yandex Browser used for searching information. It is positioned in the lower part of the browser.

Search or go to a site
  1. Enter your search query, site address or site name into the SmartBox.
  2. Tap the Enter key on your device's virtual keyboard.

The browser will determine what you need, be it a site or a search results page, and show it to you based on what you put in.