update column descriptions

Author: parodyBit

docs/smart-contracts/supported-chains.md

@@ -11,13 +11,13 @@ A complete list of the Wit/Oracle counter-factual contracts deployed by the _**W
 :::info Understanding the Capabilities
 - **Network**: The blockchain ecosystem where Witnet is currently operational.
 
-- **PUSH Data Feeds**: Data is pushed to the blockchain based on a heartbeat (e.g., every 24 hours) or price deviation (e.g., 0.5% change). Ideal for simple "read" operations.
+- **PUSH Data Feeds**: Bring secure, notarized data to your smart contracts with Witnet’s permissionless reporting. By verifying data sources and transformations directly on-chain, Witnet eliminates the risk of fraudulent or 'fake' data delivery.
 
-- **PULL Data Feeds**: On-demand updates. Users "pull" the data into their transaction to ensure the price is fresh at the exact moment of execution, often saving significant gas for the protocol.
+- **PULL Data Feeds**: Programnatically define how and where your data is fetched, allowing your smart contracts to pull cryptographically verified, tamper-proof updates from the Witnet network on demand.
 
-- **Backed Price Feeds**: These are specific feeds subsidized by the Witnet Foundation to ensure high-quality data is readily available for the community. Note: Anyone can still permissionlessly launch and fund their own custom price feeds on any supported network using the Witnet SDK.
+- **Backed Price Feeds**: Reliable DeFi price feeds, subsidized and periodically updated by the Witnet Foundation to ensure maximum data quality and availability.
 
-- **Verifiable Randomness**: Confirms the availability of the Witnet Randomness Oracle, providing cryptographically secure, non-biasable entropy for gaming, NFTs, and lotteries.
+- **Verifiable Randomness**: Generate secure, non-biasable randomness for gaming and NFTs with Witnet’s cryptographically verifiable entropy oracle.
 
 For more information check out the [quick tutorials](https://docs.witnet.io/intro/tutorials/).