What Is a Slot?



A narrow notch or groove, as in a keyway in a piece of machinery or a slit for a coin in a vending machine. Also used to refer to a position in a group, series, sequence, etc.: He has a slot as chief copy editor of the Gazette.

A slot is an iGaming industry term for the theoretical payout percentage or odds that a slot machine offers based on the amount paid in. These numbers are provided by the slot machine manufacturer and include information such as the number of reels, specific symbols, and how many coins can be played per spin. The slots are essentially mathematical simulations using a random number generator to determine which symbols will appear on the reels and how much money can be won by lining them up along pay lines.

Slots are dynamic placeholders that hold content dictated by a scenario that either uses the Add Items to Slot action or a renderer to fill the slot with content. They work in tandem with Render Scope to display and manage the contents of a page, although they do not have access to state that is passed between parent and child scopes. A slot is designed to be filled with a single type of content, and it is not recommended that a slot be fed from more than one scenario for content management reasons. This can lead to unpredictable results. For example, a slot of type Media-image could only contain images and not text.