Infographics seem to be becoming a very popular method for displaying information on social media and search engine marketing, as well as a useful link building tool for their producers. Below are a collection of useful infographics I have come across recently that help explain search engine marketing, SEO and PPC.
Infographic by PPC Blog
Scatter plot graphic by SEOmoz
Pagerank and Linkjuice Infographic by Elliance
[...] Search Marketing Infographics (robweatherhead.co.uk) [...]