If your work in the SEO industry or are an SEO client, a webmaster or just web geek who is interested to learn how much he knows about Search Engine Optimization, check out my 8 favorite website to test your SEO knowledge:

SEOmoz Expert Quiz

SEOmoz Expert Quiz is the best online destination for testing your knowledge in search engine optimization, in my opinion. It includes 75 questions with a wide range of topics. You be awarded with a badge at the end. Depending on your final score, you’ll be an “SEO Novice” or “SEO Master”. Highly recommended.

SEO Test by SEMPO

The SEMPO SEO test is a good online quiz with some tricky questions. Although I expected that the official organization of Search Marketing professionals in the United States would have offered a more sophisticated test with a wider range of topics, it still give you a good idea where you stand with your SEO knowledge – especially, if you consider to enroll in one of the SEO or SEM online courses offered by the SEMPO institute. This online test has room for improvement with its 20 questions, but is still worth checking out.

Knowledge Tests By SEOconsultants.com

The Knowledge Tests by SEOconsultants offer 5 sets of questions for five different knowledge domains: “General”, “Google Guidelines”, HTTP Status Code”, “Internet History” and “Search Engine Trivia”. A good mix or simple and challenging questions. Answers come with useful explanations.

SEO & SEM Quiz by Vertical Leap

The SEO & SEM Quiz by the UK base search marketing company Vertical Leap is short and sweet – and requires some good insider knowledge about the search marketing industry. The 25 questions include some fun stuff, like “‘MSN Dude’ is a member of which forum?”. You’ll receive your score at the end, but unfortunately no explanation which the right answers are.

SEO Quiz by About.com

The SEO Quiz by About.com is a great online test which is embedded in the ‘web search’ section of About.com. Every question comes with a link list of topic related resources and related articles. This is a phantasitc quiz to test and expand your knowledge at the same time.

SEO Quiz by Webconfs.com

Webconfs.com, infamous portal for SEO tools and webmaster utilities, offers a good SEO Quiz with 10 questions. Despite its very generic design, the search engine optimization test includes some tricky questions and well-written, comprehensible explanations for the answers.

SEO Cartoon Quiz

The SEO Cartoon Quiz by Tel Aviv based internet marketing company AIMS is probably the most entertaining SEO test you’ll find on the world wide web. In the 15 ‘questions’, you have to guess what the cartoons represent. You don’t really test your own SEO knowledge – but it’s a lot of fun!

Needless to say that you need to take this tests with a grain of salt. Due to the fact-pace nature of the industry, SEO knowledge remains something fluid.

Did you find additional SEO online tests I should add to this list? Let me know!

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