The service offered by Nanopool is based on mining, in which users generate high amounts of coins, in this case ETH, which is the main one and promoted by this site. Other minable coins such as ETC, Monero, Grin, among others, are also found in its domain.
It provides a very good mining service since you can make various daily charges to your standard wallet without any inconvenience but with considerable commissions. It is a good option for coin mining although it has great competition in the market from other mining platforms, but Nanopool is a recommended option.