Polkadot will enable a completely decentralized web where users are in control. Polkadot is built to connect private and consortium chains, public and permissionless networks, oracles, and future technologies that are yet to be created. Polkadot facilitates an internet where independent blockchains can exchange information and transactions in a trustless way via the Polkadot relay chain.
Polkadot is a sharded blockchain protocol which allows for autonomous chains called parachains to transfer information between each other and operate under a shared security model.
Each validator in the active set earns the same reward, regardless of the stake nominated to it. The reward, after validator commission, is distributed pro-rata to nominators. Since all validators are paid the same, validators with less stake will pay more to nominators per-DOT than validators with more stake.
Rewards are paid at the end of each era (~24 hours), and must be claimed manually. However validators can claim rewards on behalf of nominators in a non-custodial fashion.
Polkadot has a very informative wiki-page. We do recommend all beginners to start from visiting it: Learn Staking
The best instructions on how to stake Polkadot (DOT) also can be found on their wiki-page.
There are to ways to earn Polkadot (DOT) by staking. You can be either a validator or a nominator.
If you have 10,000+ DOTs, please request a Controller Address from Staked instead of nominating validators directly. If you have less than 10,000 DOTs, please use the following instructions to nominate 14 validators.
Visit the Polkadot JS Dapp: https://polkadot.js.org/apps/#/explorer to get started, and make sure the network is set to Polkadot.
To nominate validators by bonding DOTs from a Stash Address:
There is a 28-day unbonding period for DOTs, during which they can’t be transferred or sold.