Large Language Models (LLMs) have gained significant attention due to their advanced capabilities in natural language generation and understanding, despite the complexity and mystery surrounding their operations. These models, built on transformer architectures and trained on extensive text datasets, excel in tasks such as text generation, translation, and question answering without needing task-specific training, thanks to few-shot and zero-shot learning. While training an LLM from scratch is resource-intensive, many pre-trained models, like Llama2 and Falcon, offer substantial linguistic knowledge, which can be leveraged through prompt engineering and fine-tuning. Prompt engineering involves refining prompts to improve LLM outputs, whereas fine-tuning adapts models to specific tasks using additional data. The choice between these techniques depends on factors like task complexity, data availability, and resource constraints. As LLMs continue to evolve, they promise to expand AI applications across various domains, with platforms like Predibase facilitating accessibility to fine-tuning and prompt engineering for open-source models.