Ask the average company director if his website can be found in the search engines and he will say 'yes'. He will probably even do a search for his company name to prove it to you.
But try searching for a company's services or products. For example if a company located in Madeira designs websites, do a Google search for 'web design Madeira'.
You will notice that our company appears on the first page of the search engine results listings, but most of the time you won't find any listings for a company on the first 4 or 5 pages. Why? Because the website has not been optimized for visitors to the site and subsequently the search engines.
Let's face it - it doesn't matter how much you paid for your website or how attractive it is. If it can't easily be found in the search engines then you are losing money every single day. Now that is a very expensive website!