原版SEO 教程，需要带走，阐述SEO 中针对GOOGLE的优化。以下开篇： In this lesson we’ll get you up to speed on the basics. First, we’ll review  what Google does all the way from visiting your page for the first time to  ranking the page in the search results. We’ll explain crawlers, the Google  algorithm, and important Google updates. Then, we’ll go deeper int o  Google’s search results page. We’ll discuss the different types of results  that could appear on that page, like organic and paid results, the  Knowledge Graph, and answer boxes. o  Google’s search results page. We’ll discuss the different types of results  that could appear on that page, like organic and paid results, the  Knowledge Graph, and answer boxes.