I’m Maile Ohye. I work at Google as a Developer Programs Tech Lead, normally from our headquarters in Mountain View, California. But today, I’m at home in San Francisco to talk about the five most common mistakes I find in SEO. Mistake number one is working on SEO before your site has a value proposition. Ask yourself, why would a user choose my site and search results? Let’s say you have a site that promotes your offline business, like a local bike repair shop.