Soso is a Chinese internet search engine that was launched in 2003. The name 'Soso' is derived from the Chinese word 'suǒsuǒ', which means 'search'. Soso is operated by Tencent, one of China's largest internet companies.

Soso offers a variety of search services, including web search, image search, music search, and video search. It also provides other online services, such as online shopping and social networking.

In recent years, Soso has faced tough competition from other search engines in China, particularly Baidu and Alibaba's search engine, Aliyun. However, Soso continues to be a popular choice for many Chinese internet users, particularly those who use Tencent's other products, such as WeChat and QQ.

Soso has also expanded its reach beyond China, with a mobile search app available in English and other languages. This has helped to increase its user base and visibility on the global stage.

In conclusion, Soso is a Chinese search engine that offers a range of search services and online products. Its name, 'suǒsuǒ', means 'search' in Chinese. Despite facing competition from other search engines, Soso remains a popular choice for many Chinese internet users and has expanded its reach beyond China.