The number 7 is seen as lucky in slots and pop culture because it often signals...

https://www.bright-bookmarks.win/the-number-7-is-seen-as-lucky-in-slots-and-pop-culture-because-it-s-tied-to-1

The number 7 is seen as lucky in slots and pop culture because it often signals big wins, like hitting 777 on classic slot machines. Its luck ties back to the seven-day week, symbolizing completeness