More than 100 billion searches are made across the globe using search engines each month, with a large chunk of those searches being conducted on Google, the world’s No. 1 site. Google rankings are largely responsible for people’s purchasing decisions, because more of the world uses the company’s search engine to further investigate the products and the services they have a keen interest in purchasing. The company’s influence is felt across the board, long before its first Tweet, binary code for I’m Feeling Lucky, was sent out on Feb. 26, 2009. So what does the company have to do at all with search engine optimization, or SEO? Everything, as most…