1. To add additional information to the cells without erasing the previous data, you can use the concatenate function in Excel. Here are the steps:
2. Select the cell where you want to add the additional information.
3. Type the equal sign (=) to start the formula.
4. Type "concatenate(" to start the concatenate function.
5. Select the cell that contains the previous data.
6. Type a comma (,) to separate the first argument.
7. Type the additional information in quotation marks.
8. Type a closing parenthesis ()) to end the function.
9. Press enter to complete the formula.

For example, if you want to add the word "new" to the end of the data in cell A1, the formula would be:

This will add the word "new" to the end of the data in cell A1 without erasing the previous data. You can then copy and paste this formula to the other cells where you want to add the additional information.