In particular, Google added a glossary of definitions and terms, additional example images to support the content in the guide, mobile devices optimization techniques and clearer wording for better readability. Google has also translated the SEO starter guide in over 40 languages.
In addition, they have finally revealed the true identity of GoogleBot. Here is a large image of GoogleBot:
Looking for more starter advice on SEO? Be sure to check out the resources on our What Is SEO / Search Engine Optimization? page.