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.
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!