I made a small extension for Opera browser, to advertise randomly selected goods on fler.cz website. They call it "to top" the item, and it means, that the product is listed on the top of the website homepage. Top action is limited to once per some time, given that time is based on the seller reputation score.
Wiki says: Opera is a freeware web browser for Microsoft Windows, Android, iOS, macOS, and Linux operating systems, developed by Opera Software. Opera is a Chromium-based browser using the Blink layout engine. It differentiates itself because of a distinct user interface and other features.