When you play a slot machine, a pay table tells you what you will win if you hit specific symbols on the pay lines. It also shows how to form winning lines, which are usually marked with coloured boxes that show where the symbols should land on each reel to trigger a pay out. The information is usually displayed on the screen of the machine and is often matched to the theme of the slot game.
A slot is a dynamic placeholder that either waits for content (passive) or calls it out (active). Slots work in tandem with renderers, which specify how the content should be presented to the end user.
One of the most common uses of a slot is on an aircraft, where it allows the plane to take off before other aircraft have reached their’slots’. This has resulted in major savings for airlines in terms of delays and fuel burn, as well as environmental benefits.