Hugging Face is a popular open-source natural language processing (NLP) tool used for building and training state-of-the-art machine learning models. It provides a wide range of pre-trained models for various NLP tasks, such as text classification, question-answering, and language translation. The tool also allows users to fine-tune and customize these models to their specific needs and data. Hugging Face has a user-friendly interface and supports multiple programming languages such as Python, JavaScript, and Rust. It has become a go-to tool for NLP researchers and practitioners due to its efficiency and ease of use.