I am Conrad Ko.
I have some suggestions for you regarding your adadvertisement on Yahoo.com.hk
Since I am an exam preparation service provider, I was conducting a search on Yahoo today with keywords “IIQE Past Paper” and “HKSI Past Paper”. Usually my competitor “Passhksi/Passiiqe” will show up but it seems your Ad, advertising Paper Products showed up which is completely irrelevant.
Upon more thorough tests, it appears to me that your advertisement on Yahoo shows up every time the word “paper” is included. In that case, your advertising dollars is wasted on irrelevant searches.
Because I am a business owner myself. I would kindly recommend you to talk to your advertising agent to avoid these kind of problems again.