Active payline is a gambling term that refers to the mechanics integrated into the design of video slots or slot machines.
As you may know, the core of slot games is comprised of reels, paylines, and symbols. To land a winning combination, a player must land three or more symbols on an active payline.
Older slot games had as little as three paylines, while some modern-day video slots have as many as a few thousand. More importantly, depending on the design of a video slot, those paylines can be fixed or adjustable. If you are playing a video slot that has adjustable paylines, you can select the number of paylines you wish to play with so that you can wager smaller amounts of money.
However, as we’ve said previously, to win, you must land a winning combination on an active payline. Landing three or more symbols on a payline you have previously made inactive won’t net you anything.