The "Jackpot Rounds" Goal requires you to play in any of the Bingo Stages that offer Jackpots (e.g., High Stakes, Midnight Express, Golden Cherry, etc.). You can find most of these Stages in the High Rollers Lobby.
 
For your Jackpot rounds to count towards this Goal, the Jackpot feature must be enabled. You can learn more about the Jackpot feature HERE.
 
In the example below for the High Stakes stage that offers Jackpot, the 8-card and 12-card options have the Jackpot feature enabled. This is indicated by the golden card along with the Spinner icon on the top-right corner of each Card options. Increasing your bet will enable the Jackpot feature for the 2-card and 4-card options.