By playing system games, you can generate multiple lines of lottery numbers quickly, without having to pick each one manually. To play a system, pick 7 or more numbers and every possible combination will be entered into the draw.
The more numbers you play in a system, the more chances you have to win, as you will enter more lines into the draw. You also have the chance of winning multiple prizes, as each line is generated from the same range of numbers.
For example, if you select 8 numbers, then 28 combinations would be generated in total.