Large Language Models are game-changers across the board. Hypothetically, they could revolutionize every aspect of your business. Where to start? Which model to choose? How can you measure the resulting performance in a reliable way so that you know that the experiment is worth your time and resources? Every new technologic wave spans these questions. Only the ones who find the answers manage to stay on top. In my talk I'll try to make an overview of the recent LLM trends illustrating them with practical business cases. I will also present basic rules of thumb that could save you time and money on the decisions regarding LLM implementation.