Polygon

is a Layer 2 scaling solution that achieves scale by utilizing sidechains for off-chain computation and a decentralized network of Proof-of-Stake (PoS) validators.

Polygon strives to solve the scalability and usability issues while not compromising on decentralization and leveraging the existing developer community and ecosystem. Polygon is an off-/sidechain scaling solution for existing platforms to provide scalability and superior user experience to DApps and user functionalities.

It is a scaling solution for public blockchains. Polygon PoS supports all the existing Ethereum tooling along with faster and cheaper transactions.

Wallet:

best part with Polygon is that you don´t need another wallet or another address if you have an Ethereum address in your Metamask.

1. Do you have a Metamask? If not here is a link on how to set up a Metamask wallet:

https://metamask.zendesk.com/hc/en-us/articles/360015489531-Getting-started-with-MetaMask

2. How to switch to Polygon mainnet in Metamask?

https://docs.polygon.technology/docs/faq/wallet-bridge-faq/#how-to-switch-to-polygon-mainnet-in-metamask

or use

https://chainlist.org/

3. How do I deposit to Polygon Wallet and also withdraw?

https://docs.polygon.technology/docs/develop/wallets/polygon-web-wallet/web-wallet-v2-guide/