Favicon

A favicon is the small icon (usually 16×16, 32×32, or 192×192) that browsers, search engines, and operating systems use to identify a website. Modern sites typically include a 32×32 .ico, a 192×192 .png, and a 180×180 apple-touch-icon for iOS.

Google has used favicons in mobile search results since 2019. Sites without a favicon get a generic globe icon — measurably reducing click-through rate.