This document discusses key factors for mobile search engine optimization (SEO). It notes that in 2015, mobile surpassed desktop for internet access. The top four mobile search factors are having a mobile-ready site, accurate directory listings, fast site performance under 1 second, and a good customer experience. It emphasizes that search engines prioritize user experience. The document promotes following Google's guidelines for prioritizing name, address, phone number, and website on mobile. It also notes that responsive design is now essential, focusing on load time under 1 second for phone, location, content, and more.