The ROUND function in Excel is used to round a number to a specified number of digits. It takes two arguments: the number to round and the number of digits to round to. The function will return a number rounded to the nearest specified digit for you.
For example, if you have the number 3.14159 and want to round it to two decimal places, the ROUND formula would return 3.14. The function works on positive and negative numbers and you can use it to round fractions, integers, and decimals.