To swap two strings in Excel, first select the cell containing the string you want to swap. Then, press and hold the Ctrl key on your keyboard and press the t key. This will open the Swap dialog box. In the Swap dialog box, select the string you want to swap in the first drop-down menu and select the string you want to swap in the second drop-down menu. Finally, click the Swap button.

You can also swap two strings by using a macro. To do this, first open the Visual Basic Editor by pressing Alt + F11. Then, in the Visual Basic Editor, click Insert > Module. This will insert a new module into your workbook. In the new module, paste the following code:

Sub SwapStrings()

Dim str1 As String
Dim str2 As String

str1 = Range("A1").Value
str2 = Range("A2").Value

Range("A1").Value = str2
Range("A2").Value = str1


End Sub

This macro will swap the strings in cells A1 and A2. To use this macro, select cells A1 and A2, then press Alt + F8. In the Macro dialog box, select SwapStrings, then click Run. The strings in cells A1 and A2 will be swapped.