SOLID principles serve as the foundation for developing object-oriented programmes that are resilient, extendable, and maintainable. SOLID is an abbreviation for a collection of techniques that, when combined, make code more adaptable to change. SOLID is a systematic design strategy that assures your programme is modular, understandable, debuggable, and refactorable. Following SOLID principles also saves time and effort in development and maintenance. SOLID keeps your code from becoming inflexible and fragile, allowing you to create long-lasting software.