Sentio is a web3 observability platform. Through its software development kit, users can collect metrics and event logs based on smart contracts' events, transactions, traces, and states across blockchains, including Ethereum, Aptos, Polygon, and Avalanche. Sentio handles the indexing process for this information, and users can build dashboards to visualize the data. This enables them to monitor for potential breaches or issues and receive alerts for certain activities on the blockchain.