Search engines need to be able to find you online before people can.
It’s no secret that people are online, and you understand the importance of being visible to your customers where they’re searching for your services. Google still dominates the search engine space, but it’s worth noting the other players in the game (Yahoo!, Bing, etc.).
A search engine is a product of a company, and we are the users. They want to provide the very best results because if they don’t, people won’t use their product. It’s the same concept as your local service business!
So, search engine optimization is the art and practice of tailoring every single page (and networking the website as a whole) so search engines will recommend you to their users. SEO care significantly increases the likelihood that they choose to show your page over your competitor’s.