What are functions in Excel primarily used for?

Functions in Excel are primarily used to execute predefined calculations. Each function is a built-in formula that performs specific operations or computations on data provided within the cells. For example, functions like SUM, AVERAGE, and COUNT are designed to perform common mathematical operations quickly and efficiently. By using these functions, users can manipulate data with ease, ensuring accuracy and saving time, as they do not need to create complex calculations manually.

The ability to use functions enhances Excel's capability for data analysis and helps users derive insights from their datasets by applying various types of calculations automatically across a range of cells. Functions can also be nested within one another for more complex analyses, offering versatility in handling data-related tasks. This makes them a fundamental part of using Excel for data analytics.