Single spacing refers to the formatting style in which lines of text are placed closely together, with no extra space between them. This is commonly used in documents, essays, and reports to create a compact appearance. In single spacing, the space between lines is typically set to 1.0, making it easier to fit more text on a page. In word processing software like Microsoft Word or Google Docs, users can easily adjust line spacing settings. Single spacing is often preferred for formal documents, as it allows for efficient use of space while maintaining readability.