: Shortening .main-navigation-container to .a1b2 saves bytes, which matters when you have billions of users [4].
Look at the pane in your browser's DevTools; it will show you this class and exactly which HTML tag it is attached to. .h9C2gAns { vertical-align:top; cursor: pointe...
: This is the unique identifier. In Google’s ecosystem, these often target specific interactive elements within a "Snippet" or "Knowledge Panel" [1]. : Shortening