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

https://research-wiki.win/index.php/Why_Do_Casino_Sites_Mention_%22Adult_Users%22_So_Often%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