If you have a website, you should pay attention to Search Engine Optimisation or what’s commonly known as SEO.
It’s the difference of people finding you and people NOT finding you on the Internet.
If you’d like a primer on what SEO is, you can really find out a lot more (such as who are Google’s founders and etc. ) by going to Wikipedia – it explains what SEO is and what it evolved from.
But if you have no time to do so, Getting Granular gives a good introduction (and a quicker one too!) about what it means to be search engine optimised. To make a long story short, the five forces of SEO are: