SLSA (Supply-chain Levels for Software Artifacts) is an industry-backed software security framework that safeguards software integrity throughout the development and delivery lifecycle. It provides a solid, structured path to prove that software is secure by design, focusing on building systems and artifacts that are tamper-resistant and trustworthy by default. Introduced in 2021, SLSA was built by a cross-industry consortium led by Google in collaboration with the Open Source Security Foundation, responding to high-profile software supply chain attacks and growing concerns over software integrity and provenance. The framework defines four security levels of increasing supply chain security guarantees, including Level 0 ("None"), Level 1 ("Provenance Exists"), Level 2 ("Hosted Build Platform"), and Level 3 ("Hardened Builds"). SLSA adoption is ramping up in industries where trust isn't optional, with cloud-native artifact management platforms offering several advantages that directly support SLSA compliance, including built-in provenance and immutability, automated signing and access controls, end-to-end traceability, scalability, and global reliability.