If you prefer Chrome to Safari, you can make it the browser used to open web links from any app.
On iPhone, most users just browse the web with Safari. It’s the default, it’s fast, secure, and power-efficient, and Apple goes out of its way to advance privacy-protecting features. But iOS does support third party browsers (even if they have to use Apple’s WebKit page rendering engine), and some people prefer Chrome. There are millions of iPhone and iPad users who prefer to use Chrome, whether it’s because of Google’s integration with its other services or to more easily synchronize with Chrome for the desktop.