A picture is worth a thousand words; a logo will tell even more.
Acting as the face of your operation, your logo will often serve as both the first impression and the lasting impression of both your name and what you are about.
Your logo is at the core of your branding strategy and can often be a strategy in itself, evolving over time. Some logos stand firm over time, while others aim to change and adapt to the times - the classic example is the comparison of Coca-Cola and Pepsi brandings.