The word text string has been frequently used while writing excel formulas. A text string means, also known as a string or simply as text, a group of characters that are used as data. Text strings are most often comprised of words, numbers, special characters, the dash symbol, or the number sign.
Remember, text strings are left-aligned in a cell while the number data is right-aligned. In some cases, you may notice that number data is left-aligned. IWhen an error is identified, a small green triangle on top left corner in the cell appears, hby selection this cell, here you can see an option/tool tip that give you a short description of the error, clcik on the tool tip to convert this cell value into number.