A logo is a visual representation of branding. Additionally, it is a graphic symbol of your business and its identity. Thus, it should exist to identify your business. Ultimately, it ensures a professional visual presence that gives visual consistency and coherence to your business across all platforms.
Specifically, your logo should inform the graphics, color, and typography of the visual identity. Additionally, it should also include identifying materials such as business cards, letterheads, and cover images.
Technically, a logo is one of the visual identity components that can evolve as your business grows. Furthermore, it’s important to ensure your logo can work well across a range of assets, from your business cards to your email marketing.