As people use smartphones for quick, on-the-go sessions, online casinos...

https://wiki-aero.win/index.php/What_Should_I_Do_If_a_Casino_Interface_Feels_Awkward_on_Mobile%3F

As people use smartphones for quick, on-the-go sessions, online casinos redesigned their sites with mobile-first UX, making navigation simple and fast. They focus on easy discovery of game catalogs, so players find favorites without hassle