Oh yeah, same here when I started. My biggest mistake was not checking the keywords properly, spent money on super broad terms that barely converted. Also, didn’t track landing page clicks well, so a lot of money went to pages that sucked. Learned fast to test small, track everything, and tweak before spending big.Recently, I've been studying about and testing Pay Per Click ads, and I'm beginning to realize how little errors may have a big impact on outcomes.
One thing I've observed is that inadequate testing of landing pages can result in significant financial waste.
I would want to hear what others have to say:
When you initially started using PPC, what was the one error that lost you money?
Learning from actual experiences and avoiding typical mistakes would be fantastic.