What is Google Hummingbird?

All paid links must include a special tag known as:

Which type of keywords are more specific?

Which black hat SEO technique involves deceiving search engines?

Which search engine patented the concept of "TrustRank" as a methodology for ranking websites and web pages?

Which of the following components make up the architecture of a web crawler?

Identify the correct black hat SEO techniques from the following:

Which functionality is used by websites to communicate with web crawlers and other web robots?

Identify the correct statements about backlinks:

What is the purpose of a 301 redirect?