What function is used to combine text from multiple cells into a single string in Excel?

The function that is used to combine text from multiple cells into a single string in Excel is TEXTJOIN. This function not only allows you to concatenate strings from different cells but also enables you to specify a delimiter that will be inserted between the strings. This makes it particularly useful when you want to format the output in a specific way, like joining names with commas or combining a list of items with a hyphen.

TEXTJOIN is highly efficient as it can handle ranges of cells and ignore empty cells, reducing the need for complex formulas to check for empty values. This flexibility in handling cell ranges and delimiters makes TEXTJOIN a robust choice compared to other options available in Excel.

While CONCATENATE is an older function that is still utilized, it is more limited in its capabilities as it requires individual cell references to be combined, making it less convenient for larger datasets. Meanwhile, JOIN and TEXTMERGE are not standard Excel functions and do not exist in the context of combining text strings, which further supports TEXTJOIN as the correct answer.