The tutorial outlines methods for retrieving cryptocurrency prices in Solidity smart contracts, emphasizing the use of Chainlink Price Feeds and Chainlink oracles. Chainlink Price Feeds offer decentralized, high-quality data by aggregating inputs from multiple sources, thus ensuring accuracy and protection against oracle attacks. This is particularly crucial for DeFi applications, which have seen significant growth and rely on accurate external data since blockchains cannot access this data natively. The tutorial provides a guide to integrating Chainlink Price Feeds into smart contracts, detailing steps for acquiring Ethereum price data on the Kovan testnet and deploying the smart contract. Additionally, it explains customizing Chainlink oracles to retrieve data from external APIs for assets not covered by existing price feeds, emphasizing the importance of decentralization in production environments. Overall, Chainlink's decentralized oracle framework enhances data reliability and flexibility for developers seeking comprehensive price data across various assets.