SEO Strategies from 90s to 2020

SEO Strategies From 90's to 2020
1999-2005 Keyword Stuffing
  Domain Keywords
  Doorway Pages
  Link Exchange
2006-2011 Content Quality
  Freshness
  TLD Domains
  One Way Link Builinding
  OnPage Optimization
  Long Tail Keywords Optimization
2012-2017 Mobile Friendly Websites
  Local SEO
  Social Media Signals
  Domain Authority
2018-2020 Mobile First
  Video
  Voice Search
  Brand
  Social Media Signals