Google has defended itself against criticism of search result quality, and has said that it will take more action to stop search engine spam.
Matt Cutts, a Google principle engineer, said in a blog post that, after several articles claiming that Google's search results are slipping, the company had checked and found no problems.
"Reading through some of these recent articles, you might ask whether our search quality has got worse," he wrote.
"The short answer is that, according to the evaluation metrics that we've refined over more than a decade, Google's search quality is better than it has ever been in terms of relevance, freshness and comprehensiveness."
The amount of English language spam has halved over the past five years, according to Cutts, and is even lower in other languages. That said, there had been a slight surge in spam in recent months, and the company is taking action.
A redesigned document-level classifier has been rolled out to eliminate more spam pages, and Google is working harder on detecting hacked sites, which were a major source of search spam in 2010.
Google will also take specific action against 'content farms' such as Direct Media and Answers.com which seek to climb the search rankings by publishing many sites with very little information.
"People are asking for even stronger action on content farms and sites that consist primarily of 'spammy' or low-quality content," said Cutts.
"The fact is that we're not perfect and, combined with users' skyrocketing expectations of Google, these imperfections get magnified in perception. However, we can and should do better."
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