"Test everything -15s, 30s, 59s": Shark Tank investor Kevin O'Leary reveals the truth about marketing

Shark Tank investor Kevin O'Leary shared a video clip via his Instagram on April 1, 2025, discussing how individuals need to "test everything." He was referring to advertisements of various lengths for marketing purposes.

Viewers must already be aware that marketing is one of the key strategies to reach the target audience and intended customers. The Shark Tank mentor advised entrepreneurs to "stop" guessing and "start" testing various advertisements. He captioned the video clip with the following:

"Stop guessing. Start testing. You think your ad is brilliant? Great. But if it’s not making money, it’s worthless. Test everything -15s, 30s, 59s. The numbers don’t lie. And if someone tells you they’re 'brand building' without talking ROAS or CAC… run. Fast."

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Shark Tank mentor Kevin O'Leary reveals his thoughts on marketing strategies, brand building, and different lengths of advertisements

In his recently shared Instagram clip, Kevin O'Leary discussed how entrepreneurs can share their message via a story. He was talking about shooting a 15, 30, and 59-second advertisement. Additionally, he also suggested to "test it."

"You have a message, you think you have a story you want to tell. Shoot a 15, shoot a 30, shoot a 59. Test it. And that leads right back to wonderads, test everything. Test it. Every assumption you make, you're going to be wrong until you test. The numbers don't lie."

Shark Tank's mentor further mentioned that people get "emotional" about various creators, but that won't make "any money." Hence, building a brand is what everyone needs to keep their focus on, rather than which creators or which "great artists" they meet.

When anyone refers to "brand bill," Kevin O'Leary referred to that as:

"That's the code for I don't know what the beep I'm doing. If somebody tells you that you're spending your money to build your brand and you're not getting a really high ROAS and a low CAC, they have no idea what they're doing. Avoid with extreme prejudice."

In his other Instagram clip shared on April 1, 2025, via his WonderAds account, Mr Wonderful shared more about integrating AI as it offers "option value." He talked about using AI to mine data and for "optionality."

The Shark Tank mentor also revealed how many of his companies use it daily for "fine-tuning."

"We use it every day for fine-tuning radio, and television commercials. 15, 30s, 59-second commercials. What word would you change to make more impact or get your customer acquisition costs down? Those kind of questions. And very often, it'll come up with great suggestions, again, option value. And we fine-tune based on the information it provides."

He mentioned using such tools in his day-to-day life and for "everyone" of his businesses. He noted that one of his companies will spend $1 million monthly on digital advertising, including television.

The Shark Tank investor noted that it was "just one" company. If he were to use it for all his companies then it would be buying $5 million worth of advertisements per day. Going with that, the prices would decrease by 30%, which he would save "millions." That was about his other business, called "wonderads.com."

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To stay updated with such AI and marketing strategies with Kevin O'Leary, fans can follow him via his socials (Instagram: @kevinolearytv).