Text mining is a research area within the field of computer science that focuses on extracting useful information and knowledge from unstructured text data. This involves using techniques from natural language processing, machine learning, and data mining to analyze and understand large amounts of textual data. Text mining can be used for various applications such as sentiment analysis, topic modeling, information retrieval, and text categorization. It is a valuable tool for organizations looking to make sense of the vast amounts of unstructured text data that is generated in today's digital age.