Code snippets in VS Code are a valuable tool for developers, enabling quick insertion of commonly used code blocks across different programming languages. The text explains how to create custom snippets stored in JSON files, accessed through the User Snippets menu, which can greatly enhance workflow efficiency. It also delves into advanced features like dynamic snippets, tab stops, placeholders, and variable placeholders, allowing for more interactive and customizable coding experiences. Furthermore, the concept of polymorphic code snippets is discussed, illustrating how a single trigger can be used across multiple programming languages for similar tasks, thus reducing the need to remember numerous snippet triggers. This approach is highlighted as particularly useful for developers working in diverse coding environments, promoting reusability and efficiency while maintaining a streamlined workflow.