update description, add cadence as related topic

Author: bartolomej

topics/flow-blockchain/index.md

@@ -5,8 +5,10 @@ logo: flow-blockchain.png
 released: Sep 29, 2020
 short_description: Flow is permissionless layer 1 blockchain.
 topic: flow-blockchain
-related: blockchain, cryptocurrency
+related: cadence, blockchain, cryptocurrency
 url: https://flow.com
 github_url: https://github.com/onflow
 ---
-A permissionless layer 1 blockchain, empowering developers to create limitless Web3 apps for mainstream adoption.
+Flow blockchain is a scalable, fast, and developer-friendly blockchain platform designed to support high-throughput applications, such as games and digital collectibles, without the need for layer-two solutions or sharding.
+
+Unlike traditional blockchain architectures, Flow utilizes a unique multi-node design, where different types of nodes perform distinct tasks - execution, verification, collection, and consensus. This design allows for significant improvements in scalability while preserving decentralization and security.