What is the name of Alphabet Inc.'s main internet search engine?

Google Search is Alphabet Inc.'s main internet search engine.

Google Search is the web-search service operated by Google, the principal subsidiary of Alphabet Inc. Alphabet became Google's parent company in 2015 through a corporate restructuring. The change placed Google Search and other Google businesses inside a broader holding-company structure.

Search advertising is a major part of Google's business and has helped make Alphabet one of the world's most valuable public companies by market capitalization. Alphabet also owns or operates businesses and products such as YouTube, Google Cloud, Android, and Waymo.

A frequent mix-up is treating Google and Alphabet as identical legal names. Google is the operating company and brand most people encounter, while Alphabet is the publicly traded parent company whose shares are used to calculate the group's market capitalization. Google Search itself is a service, not a separately listed public company.