The 12-month online membership included in the "Nintendo Switch - Nintendo Switch Sports Set" offers several benefits for users of the Nintendo Switch console. Here are the main benefits:

- Online play: It allows online play with other players over the internet.
- Cloud storage: It offers cloud storage for game saves so you can access your progress wherever you are.
- Exclusive games and content: Members get access to exclusive games and content, such as the NES and SNES Library.
- Special offers and discounts: There are special offers and discounts in the Nintendo eShop for members.
- Smartphone app: The Nintendo Switch Online app for smartphones offers additional functions and services, such as managing online friendships and participating in online gaming sessions.

This membership is an essential part of the package and extends the functionality and fun of your Nintendo Switch console.