Wager Back

Wagering Requirements is total amount of money you would need to bet/stake at the site. Incase of Poker sites you'll earn yourself certain player points for every hand you play which depends on various things like Game type, stakes and amount paid in fees or rake.

At Poker Rooms you'll earn yourself certain player points for every hand you play which depends on various things like Game type, stakes and amount paid in fees or rake.

Sportsbook: you can see your betting transaction history and add up the figure
Poker: Player Points are usually shown in the Cashier menu otherwise consult their staff
Casino: A few casinos do show total wagered amount in the player history page or you can add up your staking history figures

Depends from site to site but its usually 30 days