# On-Chain Concepts

- [Entity-Adjusted Metrics](https://docs.glassnode.com/guides-and-tutorials/on-chain-concepts/entity-adjusted-metrics.md): Entity-adjusted metrics use Glassnode's proprietary clustering algorithms to cluster addresses into "entities", and filter out on-chain activity that does not represent an exchange between entities.
- [On-chain Glossary](https://docs.glassnode.com/guides-and-tutorials/on-chain-concepts/on-chain-glossary.md): This page provides a quick reference glossary for many terms that are utilised in on-chain analysis.
- [Understanding UTXOs - The Gold Coin Analogy](https://docs.glassnode.com/guides-and-tutorials/on-chain-concepts/understanding-utxos-the-gold-coin-analogy.md): The UTXO is a fundamental technological unit within the Bitcoin blockchain, and it can be understood by way of analogy to a Gold Coin.
- [UTXO vs. Account-Based Chains](https://docs.glassnode.com/guides-and-tutorials/on-chain-concepts/utxo-vs.-account-based-chains.md): UTXO (Unspent Transaction Output) and Account-Based chains are two different "accounting methods" used by blockchains to determine the provenance and ownership of coins in the network.


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