Hey BHW, Here is a very useful list that I personally have found very useful in making sure my larger sites are safe from any Google bitch-ery. I saw one of my sites that had lost some ground and made a few chnages according to this list, and it on its way back up across the board. Please note this is NOT my list the full post is here: Code: http://themoralconcept.net/pandalist.html Anyway here is the list: ######################################################### The List: High Quality ?Do? Factors, Low Quality ?Don?t? Factors HIGH QUALITY FACTORS (in no particular order): Good usage metrics showing User Satisfaction with your content / presentation (Although outright denying using ?analytics bounce rate?, JM has mentioned numerous times (inc. JM Dec 2, Zin&JM Dec 20, 2103. Also MO SMX West, Mar 11-13, 2014. Wyz, Jul 3, 2014) user satisfaction is DIRECTLY important and keeps implying it is directly tracked. Some anecdotal experiments have shown this as well, seroundtable ?changed prices experiment?, Jul 2013. Make sure the majority of visitors are completing the desired task on pages.) Positive Social Shares / Mentions (Dec 2, 2013, JM. Mar 2014, QRG.) Positive ?Reviews? on an Independent Google Verifiable Source (JM Feb 24, 2014) Authoritative Outlinks in Your Content / Citing Your Sources (JM June 20, 2014. QRG Mar 2014.) .com, .net, and .org a quality/trust factor (MC, Sep 11, 2013) Address and /or Contact Clearly Listed on Each page (QRG, Mar 2014) Robust About Us info Inc. Mission Statement, Company Directory and other onsite signs of legitimate business (QRG, Mar 2014) Robust Contact and/or Customer Service Information (QRG, Mar 2014) A Very Positive Reputation On Blogs and Forums, etc. (QRG, Mar 2014) ?News articles, Wikipedia articles, blog posts, magazine articles, forum discussions, and ratings from independent organizations can all be sources of reputation information? Yelp, Better Business Bureau... Amazon, and Google Product Search.? Topical Experts Reference Your Site (On Web and Social) (QRG, Mar 2014) ? So it is not just about the important topical PAGES that reference you positively, but also the important, topical, people who do, and the amount who do Date Info on Every Page - ?Last Updated?? kept current, including copyright (QRG, Mar 2014) Clear Difference in Design Between Main Content And Supplemental Content (QRG, Mar 2014) Long standing Domain name, Long Standing Public Domain Registration (QRG Mar 2014. EDIT: JM denied this being a ranking factor ?as far as he knows?, Aug 25, 2014 - he may not know every little detail) Rampant Speculation About Other Possible High Quality Factors: Test the Shopping Cart For Efficiency and Ease of Use (QRG, Mar 2014) (not hard to imagine the algo trying your shopping cart to see if it loads) Web Forms Need Auto-Complete (MC, SMX Advanced, 2014) (also could be bad signal not to have it, or just part of user metrics) LOW QUALITY FACTORS (in no particular order): Bad usage metrics showing possible User Dissatisfaction with your content / presentation (including speed, UI, whitespace (or lack thereof), too many options, bad/thin/poorly written content, didn?t answer their problem / question fast or good enough, etc.) (JM, Dec 2,20, 2013. Feb 14, 24, Jun 2, 2014. MO, SMX West, Mar 11-13, 2014. Wyz, Jul 3, 2014) ? ignore or deny this at your own risk Duplicate or Aggregate, ?Tag?, or ?Category? Content (MC, Sep 11, 2013. Zin, Dec 20, 2013. JM, Nov 4, 2013, Jun 2, 2014 re. Panda 4. QRG, Mar 2014) Duplicate Titles and Meta Description (MC Nov 18, 2013) Aggressive ?search phrase? keyword use onsite, INCLUDING: URL string, page content, AND HTML code like TITLE or ALT attributes (JM, Dec 2, 2013, Jun 6, Aug 11 2014 ? also leaked Jun 6 that panda does crawl pages looking for factors, and Mar 28 2014. MC on Mar 13, 2014, SMX West.) EDIT: Keyword Stuffed Internal Links on Blog pages etc. (JM, Dec 2, 2013, Aug 25, 2014) Off-topic / Multi-Topic Links or Content Onsite (Aug 12 & Nov 18, 2013, Apr 7, 2014 all JM hangout) ? eg.: can?t have a site on finance talk about cooking recipes in their blog Clone sites are a strong panda factor (JM, Mar 10, 2014) ? Don?t forget Google?s canonicalization algo will auto-301 sufficiently identical sites to a single site whether you want them to or not, SER, Feb 25, 2014. Old or Outdated or Mistaken Facts/Info (QRG Mar 2014. JM Feb 14, 2014. New Scientist, Aug 22, 2014.) Garbage text, single sentence pages, spun text, bad construction / spelling / grammar, Bad Search Results Pages, errors on page, etc. (QRG Mar 2014, MC, SMX Advanced, 2014, PED Mar 10, 2014. JM, Jun 6,20 2014) Made for Ads site ? where users quickly click on your 50%+ ads above the fold (QRG Mar 2014. JM Feb 24, Mar 24, 2014) Excessive 404 or 500 level, or any PHP / MySQL errors (JM Feb 24, 2014) Main Content (purpose of page) is below the fold (JM, May 26, 2014. QRG Mar 2014) Excessive, Unmarked, Deceptive, Interstitial, In-between the Text Ads and Popups (QRG Mar 2014) Bad Reputation on Independent Sites (like BBB, Wiki, Scamreport, etc.) (QRG Mar 2014. Also ?Bad Merchant? algo, Mar 9, 2013. SEL) Blocking Googlebot from Onsite CSS or JS Important for Design (JM June 2,16 2014. MO SMX Advanced, June 2014) Supplemental / Sidebar Content Useless or Distracting (QRG Mar 2014) Low Quality / Spammy / Duplicated / Auto-Generated User Generated Comments / Posts (QRG, Mar 2014. JM June 2,16 2014) ? possible negative SEO exploit EMD held to higher standards (Dec 2, 2013, JM) Longer EMDs are spam factor (MC, SMX West, Mar 13, Private Convo, 2014) Slow speed a demoting factor - especially over 20 seconds to download, OR if creates ANY user dissatisfaction (check other browsers and mobile devices too) (MC, SMX Advanced, June 2013) Any Ecommerce or Health or Legal Related sites etc. (YMYL) held to higher standards to protect Users (QRG, Mar 2014) ? This can include ANY site that advises on health, or financial matters, or sells to people including any service (law, plumbing, etc.) or any purchase (real estate, ecommerce, etc.) Reading level is too low (for YMYL) ? jilted, simple, obvious text (QRG, Mar 2014) example from QRG: ?Pandas eat bamboo. Pandas eat a lot of bamboo. It?s the best food for a Panda bear.? Broken Links / Images Don?t Load / Site is Not Maintained / Pages appear abandoned (QRG, Mar 2014) ANY Affiliate or ?monetized links? or ?sneaky redirects? to affiliate sites (that are not nofollowed? or cloaked) (JM&PF Nov 18, 2013. QRG, Mar 2014) Non-useful 404 page (QRG, Mar 2014) Doorway pages (e.g. /law-chicago, /law-newyork, etc.) (JM, Jul 15, 2014) Rampant Speculation on Other Possible Bad Factors: Any other Google penalty or demotion, especially Penguin. (JM has both implied this (Oct. 11, 2013. Jan 31, 2014) but also outright denied any other Google demotion or penalty being a bad panda factor (numerous times) ? at any rate, you?ll want to clean this up anyways, if they ever let you. Might just want to start again. Google?s new policy is not very forgiving and doesn?t want to be ? MC, themoralconcept.net. JM, Aug 11, 2014)) NOT a Good OR Bad Factor: -- author snippet (JM, Dec 2, 2013) -- malware detected (JM, Apr 25, 2014) -- Https (minor boost ? runs constantly and separate from Panda. Page based) (JM, Aug 11, 2014. Aug 25) * Do we know for sure any of these factors continue to be used in Google?s Quality Algorithms positively or negatively? Nope. NOR DOES THIS MATTER. SEO now is simply a process of RISK MITIGATION. You can only go off the evidence that you have. All of these factors will MAKE YOUR SITE BETTER. And there are direct Google admissions they use it in their algos. So mitigate your risk. Or one day you just don?t rank. I dare Google to contradict any of these factors, or publish a more accurate Do and Don?t List themselves. ####################################################### This is not my work, but I found it very useful, and the author also has some very interesting conversations on ethics on SEO.. Do check him out (no Im not affiliated with him at all..) Thank you!