The ".COM.RU" domain extension is a combination of two well-known domain endings: ".COM" and ".RU". The ".COM" part stands for "commercial" and is one of the most popular and widely used domain endings globally, often used by businesses, organizations, and individuals for commercial purposes. The ".RU" part is the country code top-level domain (ccTLD) for Russia, indicating websites associated with Russia or Russian content.

Combining these two extensions, ".COM.RU" is typically used for websites that have commercial interests or connections to Russia. It's commonly utilized by businesses or individuals operating in Russia or targeting a Russian audience, but who also want to retain the familiarity and universality of the ".COM" extension.

Overall, the ".COM.RU" domain extension serves as a way to signify both commercial intent and affiliation with Russia within a website's domain name.

The ".COM.RU" domain is suitable for businesses, organizations, and individuals with commercial interests in Russia or targeting Russian audiences. It's a good choice for companies looking to establish an online presence that combines global recognition with regional relevance.