Make your logo easy to scale
Logos are also important, and because you’re going to be including your logo in your web design, it should be something that is easy to fit into a web design. Therefore obviously logos that will easily fit into a rectangular space are better than logos that contain huge circles, for example, because circles don’t scale down well.
You get a lot of wasted space around the edges of the circle, because websites need everything to fit inside a rectangle. The size of a circle determines the size of the rectangle required to contain it.
A good logo also should be easy to identify even when it is not shown in its normal color scheme.
It is a very common mistake for inexperienced graphic designers to create logos that are mostly based on color and derive their identity from color. Don’t make that mistake.