so this is why

Co-authored-by: NicNomadic <[email protected]>

docs/using/staking.md

@@ -8,7 +8,7 @@ last_update:
 Staking is the process of temporarily locking tez on the Tezos platform in exchange for rewards.
 Staked tez stays in the staker's account, but they cannot transfer that tez while it is staked.
 Stakers can unstake the tez at any time, which makes them spendable again after a delay.
-Staking is an important part of keeping Tezos secure and earning rewards from it.
+Staking is an important part of running the Tezos protocol and keeping the blockchain secure, so this is why stakers earn rewards proportional to the locked funds.
 
 Two main groups stake on Tezos: