Yousef Khalidi discusses starting a t-shirt business using Facebook ads. He shares his own experience starting with failure but eventually finding success with one successful t-shirt design. The presentation outlines the key steps to running a successful t-shirt campaign including choosing a niche, designing compelling graphics, writing effective ad copies, setting the right campaign objectives and targeting. Khalidi emphasizes the low startup costs and potential to generate high profits from t-shirt sales. He encourages attendees to take action immediately and shares revenue goals ranging from $1,000 to $100,000 per month that can be achieved by selling a certain number of t-shirts daily.