Staking is an activity where a user locks or holds funds in a  wallet to participate in maintaining the operations of a proof-of-stake (PoS)-based blockchain system. It is similar to crypto mining (PoW) in the sense that it helps a network achieve consensus while rewarding users who participate.

Staking can be an excellent way to increase your cryptocurrency holdings with minimal effort. You can stake many crypto currencies such as ADA, ATOM, VET and soon ETH with the upcoming ETH 2.0 update. Earning 5% to 25% per year in your sleep is too tantalizing not to pass up. As always, do your own research before locking your crypto for 30-60-90 or more days.

You can either stake a coin from a wallet such as Atomic or Exodus or you can stake your coins on a few exchanges (e.g. Binance, Coinbase), though they take a convenience fee. I use Atomic wallet to stake my assets and have been having incredible success with their easy to use interface. 

Stake Tezos, Cosmos and more on Coinbase: https://www.coinbase.com/join/lockwo_joa

Stake dozens of Cryptos on Atomic Wallet: https://atomicwallet.io/