Why it worked
The video effectively demonstrates the product's efficacy through a clear before-and-after comparison over a short, consistent timeframe, leveraging the popular 'skincare transformation' trend.
Summary
The video shows a before and after comparison of a person's forehead with an acne spot. Over several days, the person applies Klairs EGF Serum to the spot, and by day 7, the acne and redness have significantly reduced.
Product placement
Klairs EGF Serum (Blue Youth Activating Drop with Guaiazulene + Adenosine + EGF 10ppm) ACTS - it is applied to the skin to treat acne and acne marks. Removing it would change the outcome of the video. Klairs ACTS - it is the brand name of the serum being used. Removing it would change the brand identification of the product.