- 1990s: Internet begins → first banner ad (1993), email marketing starts, Yahoo & Google launch.
- 2000s: Google Ads (AdWords) starts (2000) → PPC grows, Facebook (2004) & YouTube (2005) bring social & video marketing, iPhone (2007) boosts mobile marketing.
- 2010s: Instagram & influencer marketing rise, automation tools grow, marketing becomes data-driven.
- 2020+: Short videos (Reels, TikTok), AI tools, voice search, and social commerce dominate.
Summary: From search & emails → to social, mobile, influencer → now AI & short videos.