Staking is the process of locking up a digital asset to provide economic security for a public blockchain. We have prepared a step-by-step guide on how to stake ATOM using Keplr (you might be using any other wallet. It doesn't really matter. The staking option works more or less the same. The idea is that you need to find the 'reward' or the 'validator' tab and then delegate the desired amount to a desired validator).
How to stake ATOM using Keplr Dashboard
To delegate the Сitizen Сosmos validator, you can follow this link or find the Citizen Cosmos validator manually, to do this open Keplr Dashboard(make sure you have some ATOM balance).