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SMX Madrid 2008 Uncovering the Algorithm A Peek Inside How Google Evaluates and Ranks Pages
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Why Do We Need to Understand Google's Algorithm?
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To Predict the Potential Challenges of Earning Top Rankings
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To Evaluate Strengths & Weaknesses in a Site's Strategy
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To Provide Expert Advice to Clients, Developers & Management
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To Understand How to Compete in the Search Results
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What Tactics Are Used to Understand Algorithms?
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Split-Testing with Nonsense Words on Controlled Domains
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An Example: This link carries more weight than this link. Why? Because it's higher up in the code.
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Trial-and-Error Testing in the SERPs
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Examination of Search Engine Patent Applications
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An Example:
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Parsing Academic Information Retrieval Papers & Tests
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An Example:
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Paying Close Attention to the Search Engine Representatives
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An Example: Owning a keyword match domain name is going to carry some weight in Google for the foreseeable future. It is something we want to reward. - Matt Cutts at the Domain Roundtable April 2008
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Learning from Blogs, Forums & the Online Community
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“Sexto Sendido” for the SERPs
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What Are the Major Elements in Google's Algorithm
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Keyword Usage
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Title Tags
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Headline Tags
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Body Text
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Domain Names & URLs
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Link Anchor Text This Anchor Text tells search engines that this URL is relevant to those keywords
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An Aside on Anchor Text...
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Meta Description Tag
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Meta Keywords Tag Meta Keywords in HTML
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Image Alt Tags
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Emphasized Text (Bold/Strong)
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Semantic Analysis?
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Domain Authority
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Building a “Domain Graph” of Links
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Domain-Level Trust Evaluation
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Inbound Link Diversity YourSite.com
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Branded Search Volume
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Registration Data & History
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Page Level Link Analysis
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Internal vs. External Links
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Editorial Link Assessment
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TrustRank
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PageRank
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Links as Votes (aka Raw Link Juice)
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Temporal Evaluation & QDF
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External Link Growth Over Time
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Content Changes over Time September 2005 May 2008
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QDF - “Query Deserves Freshness”
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Intent Detection & “QDD”
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Detecting Multiple Query Intents and Applying “Query Deserves Diversity”
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Selecting Unique Results Company names (where searchers might want positive and negative press, along w/ official company domains, e.g. “Inditex”) Product searches (where e-commerce style results might ordinarily fill up the SERPs, but Google tries to provide some reviews and non-commercial, relevant content, e.g. “iPod”) News & political searches (where it might be prudent to display "all sides" of an issue, rather than just the politically one-sided blogs that did the best job baiting links, e.g. “Zapatero”)
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Supplemental & Duplicate Results
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Why Do Pages Go “Supplemental”?
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Duplicate Content Issues
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How Search Engines Handle Duplicate Content – Step 1
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How Search Engines Handle Duplicate Content – Step 2
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Step 3
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How Search Engines Handle Duplicate Content – Step 4
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GeoTargeting
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Elements that Predict Location Server Hosting Location Language Domain Extension Domain Registration Data
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Spam Detection
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Hidden Content
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Hidden Text in HTML
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Cloaking
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Manipulative Linking
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Parasite Hosting
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The Future of Algorithms
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Personalization
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User & Usage Based Data
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Focus on Non-US/Non-English Results
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More Advanced Link Interpretation
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More Social Data
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Thank You! Slides online at: www.seomoz.org/dp/smx-madrid
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