Ollama is an open-source tool designed to make it easy to run large language models (LLMs) locally on your own computer. It handles the complexities of setting up and managing these models by bundling the model weights, configurations, and necessary data into a single package. Ollama supports a wide variety of open-source LLMs, including popular choices like Llama 2, Mistral, and others, allowing users to interact with them directly from their local machine without relying on cloud services. This local operation prioritizes privacy, enhances security by keeping data on your system, and offers flexibility for customization and offline use, making it a valuable tool for developers, researchers, and anyone interested in exploring and utilizing LLMs.