Question-Answering is a field of artificial intelligence focused on providing precise answers to user queries. It involves understanding the question's context and retrieving relevant information from various sources, such as databases or documents. This technology is commonly used in search engines and virtual assistants. There are two main types of Question-Answering systems: open-domain and closed-domain. Open-domain systems can answer questions on a wide range of topics, while closed-domain systems are specialized for specific subjects, like medical or legal information. Both types aim to enhance user experience by delivering accurate and timely responses.