Google’s Panda Update is a search filter introduced in February 2011 its main purpose was to focus on sites with poor quality content or thin content gaming the system and ranking highly in Google.
Google also looked to penalise sites with a lot of advertising as part of this update.
In an effort to assist webmasters Google has produced this 23 point check list to help people establish what is meant by “quality”
Would you trust the information presented in this article?
Is this article written by an expert or enthusiast who knows the topic well, or is it more shallow in nature?
Does the site have duplicate, overlapping, or redundant articles on the same or similar topics with slightly different keyword variations?
Would you be comfortable giving your credit card information to this site?
Does this article have spelling, stylistic, or factual errors?
Are the topics driven by genuine interests of readers of the site, or does the site generate content by attempting to guess what might rank well in search engines?
Does the article provide original content or information, original reporting, original research, or original analysis?
Does the page provide substantial value when compared to other pages in search results?
How much quality control is done on content?
Does the article describe both sides of a story?
Is the site a recognized authority on its topic?
Is the content mass-produced by or outsourced to a large number of creators, or spread across a large network of sites, so that individual pages or sites don’t get as much attention or care?
Was the article edited well, or does it appear sloppy or hastily produced?
For a health related query, would you trust information from this site?
Would you recognize this site as an authoritative source when mentioned by name?
Does this article provide a complete or comprehensive description of the topic?
Does this article contain insightful analysis or interesting information that is beyond obvious?
Is this the sort of page you’d want to bookmark, share with a friend, or recommend?
Does this article have an excessive amount of ads that distract from or interfere with the main content?
Would you expect to see this article in a printed magazine, encyclopedia or book?
Are the articles short, unsubstantial, or otherwise lacking in helpful specifics?
Are the pages produced with great care and attention to detail vs. less attention to detail?
Would users complain when they see pages from this site?
What can be done to avoid Panda?
Always produce good quality content and avoid anything that is clutter or unhelpful to a user. Look to the checklist above for more “watch outs”. As long as your content is engaging, well structured and useful to a user you should never experience a Panda penalty.