Nintendo Everything has reported that the Switch eShop now has a Games On Sale tab. The tab, which is currently rather sparse as you can see from the image above, will display all of the games that are currently on sale.
The Switch’s online features are currently free. However, at some point in 2018 they will no longer be free. From then on the services will cost players 4 Euros a month, or 8 Euros for 3 months, and finally 20 Euros for the year. Prices haven’t been confirmed in GBP yet.