Extraction is a research area focused on identifying and extracting relevant information from a large amount of unstructured or semi-structured data. This can include extracting useful data from sources such as websites, documents, social media, and other text sources. Extraction techniques involve tasks such as text mining, natural language processing, and information retrieval to extract specific information like entities, relationships, events, and sentiments. Extraction enables organizations to efficiently collect and analyze data for various purposes, such as market research, business intelligence, and decision-making.