As a test, I have entered the following formula in cell K2 of my spreadsheet: =IF($M2=today(),"Today"). This acheives the desired effect and I would like this to be applied to all the rows below (with m3 referring to k3 , m4 to k4 etc.) , HOWEVER, this sheet is updated via Google Form so I cannot leave a formula in these cells as it will be overwritten.

Therefore I need to write and run the formula in apps script but, whilst I have enough knowledge of script language to do write basic If functions, this one is beyond my skills.

I have referred to this: