<ul><li>Using interfaces in Go is essential for following SOLID principles and abstracting implementation details from the caller/client side.</li><li>The use of interfaces becomes necessary when abstracting packages from one another and for testing the caller/client side independently of external dependencies.</li><li>It is emphasized that putting an interface in front of every struct definition may not be the best practice and should be done thoughtfully after considering the need for abstraction and testing requirements.</li><li>The best practice for using interfaces in Go involves asking critical questions about the necessity of abstraction, direction of dependencies, and testing needs before deciding where interfaces should be implemented.</li></ul>

You Are Misusing Interfaces in Go - Architecture Smells: Wrong Abstractions

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