# Mumbai Testnet

By [samliu](https://paragraph.com/@liuguoqing) · 2022-11-19

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Mumbai TestnetEtherScore certifies on-chain reputations of Ethereum users based on **previous actions** (transaction history); user’s activity is represented by NFTs reflecting the concept of **collectible badges**.

*   Anyone can **issue badges** to identify and target specific users based on one or more **minting conditions** (ex: “having done 10 swaps on Uniswap”) with no-code.
    
*   Badge ownership can provide **community curation** and efficient distribution of privileges for blockchain users through access to airdrops, token sales, discounts, DAO voting power, and or any exclusive reward.
    
*   EtherScore is a **fundamental brick** still lacking for a new generation of **reputation-based services** (curated social networks, DeFi 2.0, fidelity programs, and many more) that can be employed not just on individual dApps but across the entire Ethereum ecosystem.
    
*   **ETS tokens**, in addition to representing voting power in **EtherScore DAO**, are used to pay for **protocol fees** which are redistributed to ETS stakers, DAO, and team (and eventually the badge issuer).

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*Originally published on [samliu](https://paragraph.com/@liuguoqing/mumbai-testnet)*