References & Further Readings

SEO

• SEO: A Comprehensive Guide for Beginners by Kissmetrics (short version)

• The Beginner's Guide to SEO by Moz (long version)

• The Advanced Guide to SEO by Quick Sprout

• https://searchenginewatch.com/sew/study/2276184/no-1-position-in-google-gets-33-of-search-traffic-study

• https://www.infront.com/blog/the-infront-blog/ppc-vs-seo-search-engine-marketing-explained

• https://en.wikipedia.org/wiki/Comparison_of_web_search_engines
  

SEM

• A Beginner's Guide to Paid Search by Search Engine Watch

• How to Create a Profitable Google AdWords Campaign by Kissmetrics

• https://www.statista.com/statistics/266206/googles-annual-global-revenue
  

Black Hat SEO

• https://www.searchenginejournal.com/white-vs-black-hat-seo-what-is-the-difference/183088/

• https://www.searchenginejournal.com/why-black-hat-seo-tactics-work/221821/