Quality score is Google's way of judging how relevant and useful your ad is to the person searching. It looks at three things: how often people click your ad compared to others, how well your ad matches the keyword, and how good the page is that people land on after clicking. A high quality score means Google rewards you with lower costs and better positions. A low score means you pay more and show up less. Think of it like a grade in school. The better your ad and landing page match what the user needs, the better your grade. So what do you think is the hardest part of quality score for a new advertiser to understand?