# What is PNS

PNS (Polkadot Name System) is a decentralized domain name system that provides domain name services for the Polkadot ecosystem. PNS uses `.dot` domain suffixes.

PNS allows users to register globally unique domains that can resolve various on-chain and off-chain information, such as wallet addresses, smart contract addresses, IPFS content, websites, etc. PNS domains themselves can also be traded as NFTs on the market.

## Main Use Cases of PNS

#### Websites and DApp Access

* Associate PNS domains with websites or DApps for direct access via the domain
* DApps can use PNS domains as an application entrance, binding smart contract addresses for easy upgrading

#### Unified Wallet Addresses

* Bind different addresses to a single PNS domain for unified access
* Simplifies memory burden and improves convenience for users

#### NFT Display

* NFTs can be directly bound to PNS domains
* Visiting the domain displays NFT-related information
* Collectors can showcase their NFT collections using subdomains

#### Personal Digital Identity

* PNS domains themselves serve as users' digital identity in the Web3 world

## Obtaining PNS Domains

PNS domains are mainly obtained through:

* Reservation: Important websites can reserve relevant `.dot` domains
* Auction: High-value `.dot` domains are acquired through auctions
* Open Registration: Other `.dot` domains are openly registerable

PNS provides users with secure, open, and memorable `.dot` domain name services, with abundant application scenarios.