Quality Guidelines from the Google webmaster guidelines
Google webmasters guidelines > Quality Guidelines (there are four basic principals and eight specific guidelines in this category)
The quality principles and guidelines are focused on things you can do to ensure your website is seen as a quality web presence. they also illustrate some specific things not to do.
Basic Principles
still writing these...
- Avoid hidden text or hidden links
- Don't use cloaking or sneaky redirects
- Don't create pages that install viruses, trojans, or other badware.