Yandex is a Russian technology company that offers a range of internet-based products and services, including a search engine, an email service, a cloud storage service and a mapping service. It is one of the largest technology companies in Russia and has a significant market share in the country.

Yandex's search engine is the largest in Russia and the company's most popular product. It is known for its advanced algorithms and ability to handle complex search queries in Russian, making it a popular choice for users in Russia and other Russian-speaking countries. In addition to the search engine, Yandex also offers a number of other products and services, including an advertising network, a music streaming service and a food delivery service.

Overall, Yandex is a major player in the technology industry in Russia and is known for its innovative products and services.