An Oracle Pool is a system that aggregates data from multiple external sources to provide accurate, real-time information to smart contracts on a blockchain. These oracles are necessary because blockchains typically cannot access external data directly.In an Oracle Pool, various independent providers supply data, which helps ensure reliability and minimize the risk of manipulation or errors. This diverse input allows smart contracts to make informed decisions based on the most accurate and up-to-date information available.For example, a decentralized finance (DeFi) application could use an Oracle Pool to acquire real-time pricing data for assets. By combining data from several oracles, the application can ensure that it receives a more reliable price, which is essential for functions like lending and trading.Overall, Oracle Pools enhance the functionality and security of decentralized applications by providing dependable external data, reducing the chances of a single point of failure.