One of the most important things you can have your graphic designer do is create a website header for you. A website header is an important branding tool. It tells the world who you are what your business stands for. It’s more than just an image. It creates an image.
Don’t mistake the header for a logo, however. Your company logo is different. Your logo can be a part of your header (and probably should be). But the header is not the logo.
Your logo should appear on your letterhead and other correspondence. But your header is unique to your website. If you have a blog then you can set your blog header to match your website header. And your e-mail header too. The consistency will only serve to brand you.
By branding yourself online with a unique header that tells the world what you are all about at a glance, you can create top of mind awareness for your company and brand. That makes it easier to sell when people meet you.