The document discusses 10 examples of bad SEO decisions that can negatively impact a website's organic search performance on Google. It provides case studies on issues like not following Google's guidelines, failing to keep website promises, poor product offerings compared to competitors, ignoring user behavior trends, blocking Google's crawler bot, using new domain names and site structures without redirects, having an unoptimized mobile site, and redesigning a site without 301 redirects for old URLs. The overall message is that SEOs must avoid common mistakes and focus on creating great content to maintain positive search trends over time.