Step to Activate Once a Certain Column has been filled with data on Sharepoint List

[Anonymous]

Hi Guys,

I need the flow to essentially wait until somebody has entered data in a certain column on a sharepoint list data entry. So currently the flow goes through 2 layers of approval then it asks the CreatedBy user to edit their data entry and input a numeric variable. Then once this is complete, it must then go to another user to notify them to also do something similar and then lastly notify someone else once that has been done?

Anyone got any ideas? Thanks for your help in advance.