In Solidity smart contracts, accessing price data is a critical requirement for DeFi applications, which can be achieved through Chainlink price feeds or external APIs via Chainlink oracles. The tutorial explains both methods and provides code examples for building, deploying, and testing smart contracts, emphasizing the importance of data quality and decentralization. As DeFi protocols continue to grow, accurate, reliable price data becomes essential to protect against vulnerabilities such as oracle attacks. Chainlink's price feeds mitigate these risks by aggregating data from multiple high-quality sources through a decentralized oracle network, ensuring the final price reflects a comprehensive market view. The tutorial details using Chainlink price feeds to obtain Ethereum price data on the Kovan test network, demonstrating the steps to create, deploy, and test a contract without needing LINK tokens for data requests. Additionally, it covers obtaining other asset prices using Chainlink oracles and external APIs when specific price data is not covered by existing feeds, highlighting Chainlink's flexibility for developers seeking diverse price data sources.