Link Decay And Link Equity Preservation

by Gareth on August 31, 2011

The majority of link building posts I see focus on acquiring new links, but what about your existing links?  Once you have a strong link profile, this needs to be monitored and consolidated.  You don’t want your best links to drop off.  This post looks at ‘link decay’ also know as ‘web decay and ‘link rot’.

What is link decay

‘Web decay’ in information retrieval science refers to the loss of pages from the Internet.  Back in 2006 Bill Slawski blogged about a patent that looked at link decay, where web pages were found to disappear from the web at a rate of 0.5% per week.

Link Decay

Worldwidewebsize calculates total pages on the Internet at 19.64 Billion, while SEOmoz say the average page has 13.32 external links on it.  By my calculations that’s 1.3 Billion links being wiped out each week!

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This is a guest post from Tad Chef  (Onreact), you can check out more of his blogging on SEO 2.0 and over at SEOptimise.

Over the years Google has maintained that inbound links can’t hurt your site yet many webmasters get notified via Google Webmaster Tools of “unnatural links” when they get penalized. What are unnatural links and how can you spot them? Aren’t all links great? How to prevent an epic link building FAIL?

The bad news: Not all links are created equal, some of them are evil. The good news: We know how the evil links look and we can spot them. There are even tools which assist you with this task.

As we all know good natural links grow on trees, so to say.

As on the Web there are no trees, unless in games like Farmville, you have to grow your organic links on websites. Unlike organic food sadly websites do not have clear badges proving that a site has certified organic links. Some sites may boast they have such links but you have to check and find out yourself whether it’s true.

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IP Delivery and Geo Targeting by SebastianX

September 20, 2011

This is a guest post from the elusive SebastianX , you can read more of his rants on his excellent blog Sebastian’s Pamphlets. So Gareth James asked me to blather about the role of IP delivery in geo targeting. I answered “That’s a complex topic with gazillions of ‘depends’ lacking the potential of getting handled with

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First Link Counts Rule and Alt Text

February 4, 2011

This is a guest post by Giuseppe Pastore, an SEO in an italian agency. In his personal blog, Posizionamento Zen, he eventually writes about Search Engine Optimization and Web Marketing in general. You can find him on Twitter too (@Zen2Seo). This post is a follow up on a post he did on SEOMoz. Just 2

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Conversion Rates: To Pay, Or Not To Pay?

December 17, 2010

This is a guest post by Ben Morel, who is the search engine marketing specialist at a Surrey digital marketing agency. He has a background in marketing, offshore finance and radio astronomy. ——————————————————————————————— While Gareth and I were deciding on the subject of this guest post, we ended up discussing the differences between paid and

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Foursquare Marketing Guide

August 18, 2010

Further to my local seo citations post, I wanted to take a look at Foursquare as a geo-marketing tool for local businesses and brands. Foursquare is a game which “connects local businesses with it’s customers”. The game is based on unlocking badges, but Foursquare is far more than a game.  Users check into local places

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Local SEO: 20 Authority Citation Places

June 18, 2010

This is post looks at UK specific citation places, but many will have sections for other countries.  For pure US citation sources try here.

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Top SMX London Tips 2010

May 17, 2010

Being a freelance seo, I was unable to attend SMX London – £1295 for 2 days could not be justified…besides I have Twitter!!  Here is a round up of the top SMX tips and news which came live from Twitter using the #smx tag. Thanks to all the live bloggers for sharing.  Also included are

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Linkbait: The Most Linked to Articles

April 21, 2010

After researching Linkbait, I wanted to share some of my findings.  I wanted to discover which posts/articles on some of my favourite blogs attracted the most raw links.  Some blog posts look like great linkbait pieces, but have failed to attract good link quantities.  Pure linkbait has to attract links or it has failed it’s

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SEO Doctor 1.0 Firefox Extension

March 27, 2010

This week the SEO Doctor Firefox Extension was released.  The tool gives you a mini SEO audit looking at H1 tags through to Robots.txt info.  The tool sits in your status bar below and gives you an SEO Score – this site scored 100% which was nice

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