The Importance of a Logical, Category-Based FlowUsability and search friendlinessAn analogySubdomainsRedirectsURLsSite Architecture Design PrinciplesDesigning site architectureCategory structuringCreating broad→narrow topical relevanceTaxonomy and ontologyFlat Versus Deep ArchitectureSearch-Friendly Site NavigationBasics of search engine friendlinessSite elements that are problematic for spidersSearch and web formsJava, images, audio, and videoAJAX and JavaScriptFramesSearch-engine-friendly navigation guidelines