Ask a Gen Z marketer when digital marketing started, and they might say “When Facebook launched.” Ask a veteran, and they might say “When the internet was invented.”

Both are technically incorrect.

The term “Digital Marketing” was first coined in the 1990s, but the practice of beaming information to customers through screens and signals began much earlier.

To truly understand where we are going (AI and Automation), we must look at where we came from. Here is the definitive timeline of the industry, separated into the Proto-Digital Era and the Modern Internet Era.

The “Proto-Digital” Era (Before the Internet)

Before we had the World Wide Web, we had digital signals.

1896: The First Wireless Transmission

Believe it or not, Guglielmo Marconi is the grandfather of digital marketing. By demonstrating the first public transmission of wireless signals (Radio), he invented the concept of broadcasting a message to an invisible audience. It wasn’t “digital” in the binary sense, but it was the first step away from physical print advertising.

1971: The First Email

Ray Tomlinson sent the very first email. He chose the “@” symbol to separate the user from the machine.

• Why it matters: This created the channel for what is still the highest ROI marketing strategy today: Email Marketing.

1978: The First Spam Message

A distinct milestone. Gary Thuerk, a marketing manager at DEC (Digital Equipment Corp), sent an unsolicited mass email to 400 users on ARPANET promoting his computers.

• The Result: He generated $13 million in sales.

• The Backlash: People hated it. Thus, “Spam” was born.

The Modern Era (The Birth of the Web)

This is when “Digital Marketing” became a recognized industry.

1990: The “Archie” Search Engine

Before Google, there was Archie. It was an index for FTP sites. Around this time, the term “Digital Marketing” was first used, coinciding with the launch of the first web browser (WorldWideWeb) by Tim Berners-Lee.

1994: The First Banner Ad (The “Click” is Born)

This is arguably the most important day in our history. The magazine HotWired (now Wired) sold a banner ad slot to AT&T.

The ad copy read: “Have you ever clicked your mouse right here? You will.”

• The Result: It had a 44% Click-Through Rate (CTR).

• Context: Today, a good CTR is 0.1%. In 1994, people clicked because they had never seen a clickable image before. This proved that the internet could be monetized.

1994: The Invention of the Cookie

In the same year, Netscape invented the “Cookie.” This allowed websites to track user behavior and remember who they were. Without this, Retargeting and Analytics would not exist.

The Search & Social Era (1998 – 2007)

1998: Google Launches

Larry Page and Sergey Brin founded Google. Unlike other engines (Yahoo/Altavista) that were cluttered portals, Google focused on relevance.

• The Shift: Marketers realized they couldn’t just “buy” attention (Ads); they had to “earn” it (SEO).

2004: Web 2.0 and Facebook

The internet shifted from “Read Only” (static pages) to “Read/Write” (Social Media). Users started creating content. Marketers lost control of the narrative. Now, customers could talk back.

The Mobile Era (2007 – Present)

2007: The iPhone

Steve Jobs introduced the iPhone. Suddenly, the internet was in everyone’s pocket, 24/7.

• The Shift: “Mobile-First” became the standard. Location-based marketing became possible.

The Smart Era (Present Day)

We are now in the age of Data and AI.

• Big Data: We don’t just target “Men in New York”; we target “Men in New York who bought shoes yesterday and are currently walking near our store.”

• AI: ChatGPT and automated bidding are replacing manual labor.

Conclusion

So, when did digital marketing start?

• Technically: 1896 (Marconi).

• Practically: 1994 (The AT&T Banner Ad).

The medium changes (Radio -> Email -> Web -> Mobile -> AI), but the goal remains the same: Delivering the right message to the right person at the right time.