What is up logo?

As an AI language model, It is unclear what the specific "up" logo being referred to is without additional context. There are many logos that feature the word "up" or an upward arrow.

However, there is a popular company, Upwork, that features a logo with the word "Up" in bold blue letters with an upward arrow included in the design. Upwork is a freelance platform that connects employers with freelancers from different industries. The logo design implies growth, progress, and lifting up, reflecting the company's services' nature.

Another famous logo that comes to mind is the famous Pixar Animation Studios logo, which features the word "Pixar" and the Lamp mascot positioned to the right of an old vintage-looking desk lamp. Its lamp mascot is seen hopping on the letter "I" to replace it, signifying the company's productions' creative and imaginative nature. This logo primarily reflects creativity, imagination, and innovation.

There are many other "up" logos and interpretations, and additional context is required to clarify which one is being asked about.