Shanette introduces the Wing Eyeliner Pen & Stamp by KAJA in her video review. She explains that the product consists of two parts: a left and right stamp for creating the perfect winged eyeliner, and an eyeliner pencil. Shanette demonstrates how to use the left stamp on her left eye, achieving a flawless winged look effortlessly. The product's key benefit is its convenience, as it combines both stamp and eyeliner in one. However, the video does not mention any potential drawbacks or issues with the product. Overall, the Wing Eyeliner Pen & Stamp by KAJA seems to be a useful tool for achieving a precise and symmetrical winged eyeliner look.