Nintendo Switch Online 3 Month Individual Membership
Save Data Cloud backup compatibility varies per game. Some titles, including Splatoon 2 and 1-2-Switch, are not compatible.
Persistent Internet and compatible smartphone required to use app. Data charges may apply. Nintendo Account age 13+ required to access some online features, including voice chat. Smartphone app features available in compatible games. Terms apply. nintendo.com/switch-online
Persistent Internet and compatible smartphone required to use app. Data charges may apply. Nintendo Account age 13+ required. Online play, Save Data Cloud backup and Nintendo Switch Online smartphone app features available in compatible games. Not available in all countries. The Nintendo Account User Agreement, including the Purchase and Subscription terms, apply. nintendo.com/switch-online
They give you a code and you enter under "redeem code" on the eShop.
yes it will, all you need is the code and youre ready to go
You can buy it at your local Gamestop
If a game has online connectivity, you're able to use it if you have this membership. You don't have to pay for online access for each game individually.