For the users, via the Chrome brand, and via being pre-installed on Chromebooks and Android. By far most users run Chrome, not Chromium forks, and this would continue after a competent acquisition.

Whoever owns Chrome decides exactly what software most users run for web browsing, decides future web standards in practice, decides which kinds of extensions most users can use, decides the limits and carve-outs of adblockers, codecs and web features, has all the telemetry, and in future decides what AI-driven "presentational" modifications to web pages will be done, and what semantic scraping and uploading will happen automatically in the browser.