> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt ## Resource: Introduction ## Article: Introduction ## Article Link: https://dev.wix.com/docs/api-reference/business-solutions/restaurants/menus/items/item-modifier-groups/introduction.md ## Article Content: # About Item Modifier Groups The Item Modifier Groups API allows you to manage your item modifier groups. Item modifier groups gather individual menu items (or [item modifiers](https://dev.wix.com/docs/api-reference/business-solutions/restaurants/menus/items/item-modifiers/introduction.md)) that can be used to modify, enhance, or specify existing menu items in an order. For example, a modifier group is called "Pizza toppings" and has the following modifier items: "extra cheese", "pepperoni", "mushrooms". With the Item Modifier Groups API, you can: - Create, delete, and update item modifier groups. - Retrieve the information about item modifier groups. ## Before you begin It's important to note the following point before starting to code: - The Item Modifier Groups API only works with the Wix Restaurants Menus app. Make sure you downloaded this app from [Wix App Market](https://www.wix.com/app-market/wix-restaurants-menus-new). ## Use cases - [Sync pizza menu across all sites](https://dev.wix.com/docs/api-reference/business-solutions/restaurants/menus/items/item-modifier-groups/sample-use-cases-and-flows.md#sync-pizza-menu-across-all-sites) ## Terminology - **Menu**: A list of food and beverage items available for purchase at a restaurant, café, or other dining establishment. - **Item modifier**: Type of menu item that serves as an addition to an existing menu item. For example, "Almond milk" could be an item modifier that can be applied to a coffee order. @sdk_package_setup