Text files are simple digital documents that store information in a format that can be easily read and edited by humans and computers. They typically contain plain text without any special formatting, making them lightweight and easy to share. Common file extensions for text files include .txt, .csv, and .log. These files can be created and opened using various software applications, such as text editors like .Notepad or .TextEdit. Text files are often used for storing data, writing scripts, or keeping notes, as they are compatible with many programming languages and can be processed by different software tools.