When Detroit's first radio station, 8MK (now, WWJ), began broadcasting on August 20, 1920, the station needed a tall antenna and lots of buried copper cable to transmit its signal.  Radio receivers at the time were mostly homemade and involved a piece of crystalline mineral and a wire coil.

Over many decades in Detroit, both the broadcasting and receiving equipment improved. In the mid-1920s this meant store-bought radios. In the 1930s this meant car radios. In the 1960s this meant transistor radios. In the 1970s this meant boom boxes. And, in the 1980s this meant Walkmen. But, despite these improvements, the fundamental technology of big towers sending a signal through the air to a radio receiver remained the same.

In 1994, there was a new way for Detroit consumers to listen to the radio. That was the year local stations across the country began streaming their signals over the internet and listeners could use their computers (later their smartphones and smart speakers) as receiving devices. No big antennas, no wires, and no actual radio needed.

In 2021, according to Nielsen, Detroit radio reaches more local consumers than any other advertising media option.

Neilsen finds, too, that 30.2% of all consumers who listen to a Detroit radio station over-the-air will, at some point during the month, also connect to a local station via the internet. 

According to Nielsen, 3.3 million adults in the Detroit area have access to the internet, equivalent to 94.4% of the population. On average, local consumers are spending 10.19 hours per week online.

Detroit millennials, the first generation that grew up in a digital world, spend considerably more time online. Nielsen reports that, on average, Detroit's 25-39-year-old consumers are clocking 12.65 hours connected to the internet.

So, how are Detroit consumers spending their time online?

According to Nielsen, streaming audio and video content, social networking, checking the weather, and banking are the top online activities for Detroit consumers each month.

Each week, according to Nielsen, 62.5% of Southeast Michigan consumers watch video programs that aren't delivered over-the-air by local TV stations.  They aren't coming from a local cable company or by satellite.  Instead, these programs are being streamed directly to viewers via an internet connection.

This type of streamed video content is called OTT (Over-The-Top-Television) or CTV (Connected-Television). These two terms are sometimes are often used interchangeably but do have a subtle difference.

OTT generally means the video is watched on a small device like a computer, tablet, or smartphone.  CTV, on the other hand, typically means the content is viewed on a smart-TV or a regular television using a streaming device like a Roku or Amazon stick.

In Metro Detroit, OTT/CTV has exceeded the weekly reach of local newspapers and streaming audio services such as Pandora and Spotify. The medium is rapidly approaching the reach of local cable and broadcast TV stations.

Southeast Michigan business owners are expected to invest $964-million during 2021 to advertise to consumers connected to the internet. This forecast was produced by Borrell Associates, a company that tracks business advertising expenditures across the country.

These online marketing dollars will be spent on banner advertising, search engine marketing, email, as well as audio and video advertising. This is all to capture the attention of shoppers and buyers as they go about their connected days.

According to Nielsen, 92.9% of adult consumers in the Detroit area have access to the internet. They connect, primarily, with desktop and laptop computers; smartphones; or tablets.

Ninety-six percent of Detroit adults spend at least one hour per week online, with most spending at least 10 hours connected.