A text field is a user interface element that allows users to input text data. It is commonly found in forms, applications, and websites, enabling users to enter information such as names, addresses, or comments. Text fields can vary in size and may have specific formatting requirements, such as character limits. Text fields can be single-line or multi-line, depending on the amount of text needed. They are often accompanied by labels or placeholders to guide users on what information to provide. Common examples of text fields include those used in registration forms, search bars, and comment sections.