Large-scale web applications like Google use "CSS-in-JS" or automated build tools that "minify" and "hash" class names. This serves two main purposes:

The CSS class .b3MoKnAh is an obfuscated or dynamically generated selector, most notably associated with the results interface [1, 2].

: This changes the mouse cursor to a hand icon, signaling to the user that the element is clickable [1]. Why do sites use names like this?