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Positive Ranking Factors
1. Keyword Focused Anchor Text from External Links
2. External Link Popularity (quantity/quality of external links)
3. Diversity of Link Sources (links from many unique root domains)
4. Keyword Use Anywhere in the Title Tag
5. Trustworthiness of the Domain Based on Link Distance from
Trusted Domains (e.g. TrustRank, Domain mozTrust, etc.)
Negative Ranking Factors
1. Cloaking with Malicious/Manipulative Intent
2. Link Acquisition from Known Link Brokers/Sellers
3. Links from the Page to Web Spam Sites/Pages
4. Cloaking by User Agent
5. Frequent Server Downtime & Site Inaccessibility
Most Contentious Factors
1. Cloaking by Cookie Detection 16.3% strong contention
2. Cloaking by JavaScript/Rich Media Support Detection
3. Hiding Text with same/similar colored text/background
4. Cloaking by IP Address
5. Cloaking by User Agent
Effectiveness of Link Building Tactics for SEO
1. Linkbait + Viral Content Creation
2. Blogging and Engagement with the Blogosphere
3. Classic “Create Valuable Content” Strategies w/o Promotional Marketing
4. Public Relations (beyond just press release publication)
5. Direct Link Purchases from Individual Sites/Webmasters
6. Widgets and Embeddable Content
7. Conferences, Events and In-Person Networking
8. User Generated Content (which then incentivizes links to profiles/content/etc.)
9. High Trust/Authority Directories (DMOZ, Yahoo!, Lii, etc.)
10. Niche Social Media Communities
11. Local Link Building (via geographic lists, organizations, portals)
12. Social Voting Portals (Digg, Reddit, Mixx, etc.)
13. Quizzes + Results Badges
14. Social Bookmarking Services (StumbleUpon, Delicious, etc.)
15. Contributing to Charities, Non-profits, Events, etc. to Earn Links
16. Leveraging Twitter for Link Building
17. Generic Directory Links (BOTW, JoeAnt, Business.com, etc.)
18. Contacting Webmasters or Sites with (Non-Paid) Direct Link Requests
19. Offline Advertising Branding and Media
20. Press Releases
21. Long Tail Directory Links (niche directories, small generic directories, etc.)
22. Social Networking Services (Facebook, MySpace, LinkedIn)
23. Purchasing Links from Link Brokers
24. Launching & Later, Redirecting Microsites via 301s
25. Buying Old Domains & Placing Links on Them
26. Buying Old Domains & 301’ing Them
27. Reciprocal Linking (trading links with other sites)
28. DoFollow Blog Comments
29. Web Advertising (Banners, PPC, etc.)
30. Forum Link Building (Signatures, Link Drops, etc.)
31. Automated Blog, Guestbook and Open Form Comment Spam
