Google vs Search Engine Optimization
Google is one of the best search engines in the world ever, it has high quality algorithms, it is too difficult to compare it with SEO because SEO is completely a different thing than google. It is not a part of google programs. Basically, SEO includes writing copy, giving advice on site architecture and helping to find relevant directories and more. These could be part of SEO, but they fail to give the sense of SEO that is understood by the term search engine optimization.
Purpose of SEO is to increase website ranking while the google is a way that gives rank to your site.
SEO only can do efforts to achieve targeted traffic or to increase ROI but google is responsible for all that.
SEO is a combination of different operations with a single aim while google is it self a search engine that has it’s own strategies to search the websites that are send after the SEO process.