Unless your website is one of the only sites of it's type and you've had it for more than 10-15 years, odds are you probably don't appear high on the search engines. A properly optimized website will ensure that you are high on the rankings of major search engines like Google and Bing!
A website that is high up on the search engine rankings is a website that is viewed often. This results in a highly visible brand for your company which ensures more website visitors and more potential for sales for your company.
When people search on search engines such as Google or Bing, they have immediate trust in websites that appear on the first page of the search results. Ensuring that your website is properly optimized increases the trust potential visitors have in your company.
Not only does a properly optimized website increase your search engine ranking, it has other benefits such as making your website more user friendly. This increases the chances that people who find your website do not immediately leave and potentially become customers.
A website that is properly optimized for search engines will increase your chances of potential sales. A properly optimized website will appear higher on search engines, on various business directories, as well as elsewhere on the internet. This means more visitors which can be converted into customers.
In most cases, your competitors' website is not properly optimized for search engines. In some cases they are not optimized at all. Optimizing your website automatically gives you an advantage over them as you will end up appearing higher on the search engine than they do.