The Google Panda update has been designed to target web pages that do not offer great quality in terms of content. Its aim is to reduce the rankings positions of low-quality sites while at the same time providing better ranking positions for sites with original, up-to-date, quality content.
Moreover, if a site is found to have several pages that offer little quality and are rather thin on content side of things that site will be susceptible to getting a site-wide penalty from Google. This will greatly affect the ability of that webpage to rank in Google and is difficult to reverse.
This specific algorithm update also looks to stop scrapper sites (sites that republish other sites content) from outranking original content.
In short, the main reason behind the Panda update is to remove low quality pages from search engine results pages. You must understand that Googleís reason díÍtre is to provide its users with best results for their search query. Therefore, when building your website keep in mind that ìcontent is kingî. Using that as your motto, eventually links to your site should follow. Of course link building/SEO is not that simple, but quality content should be the cornerstone to every SEO campaign.
Simply, the Penguin update is Googleís attempt to remove webspam from its results pages. It has been designed to cut the rankings of spam-related sites and push up quality sites that are offering regularly-updated and useful content. Those sites with good quality incoming links, articles and other content will not suffer. Businesses that are seeing problems from Penguin are using bad practice techniques such as aggressive, exact-match anchor text, poor quality blog posts and keyword and footer keyword stuffing. In other words, spammy techniques designed to ‘trick’ the search engines into a ranking their site highly.