i realised one of my pages, abc.html had a whole load of PSA in place of a google ad. it wasn't like this in the past and i have no idea why it became like this. however, i waited a while, hoping it will come back, but it didn't.
i did a small experiment.
i saved abc.html as cde.html with exactly the same content and google ads in exactly the same places (basically exactly the same as abc.html) and uploaded it. Lo and behold, the psa disappeared and out came the google ads. May I know why is it like this?