The read cell activity works to read the value and store in a variable.
The second one you used is correct.
The read cell and write cell activities should be use to read the value and write the value and there is an another option you can use copy paste activity.
Hi @Volodymyr_Myshko The read cell value is used to retrieve particular cell value from the excel and the save to option is used for saving the particular cell value in a string variable.
If you need to read a particular cell value from excel then use read cell and store it in a variable and to write it in a new cell use write cell activity .
In write cell pass the string variable in what to write tab and the cell value in where to write.