Google replaces old PDF version of the SEO Starter Guide, created way back in 2008 with a new web-based version of the guide.
According to Google sources, this new version has come out of merging the Webmaster Academy and the old SEO Starter Guide PDF into one resource section. This updated version has been built on top of the previously available document and has additional features for catering to the needs of search engine optimization, adding structured data markup and building mobile-friendly websites.
Currently, this new one is available in nine different languages, including English, German, Spanish, French, Italian, Japanese, Portuguese, Russian and Turkish.
Having some overlapping purpose and content, Google claims it to be helpful for webmasters in creating modern, search-engine-friendly websites.