This is a type of bet that asks you to choose a number and place wagers on its “neighbors” to the left and right. In the traditional neighbors bet, two numbers are chosen from the right and left side, meaning you bet on 5 numbers in total (2 + 1 + 2). These are all straight bets, independent of each other. However, placing bets on five numbers is not your only option: if you wish, you can make this bet cover more numbers by choosing more neighbors (for example, 3 + 1 + 3).
The point to note here is that this bet is placed according to the wheel, not the table. The numbers on the table form a consecutive sequence, while the numbers on the wheel do not follow a specific sequence. So, for example, the neighbors of “8” are not 6, 7 and 9, 10: if you look at the wheel, you will see that the left neighbors of this number are 11 and 30, and the right neighbors are 23 and 10. Neighbor betting allows you to cover certain sectors on the wheel.