Search what? I hear you ask. SEO is all about using techniques that make your website findable by search engines. Search Engine Optimisation is one of those things that is very important, can take a lot of time to get just right but is seemingly transparent to the user and the website itself.

Not so much a service as a right really. SEO is such a crucial aspect of any website that I wouldn't even consider doing a project without it, in fact given the way I work and create my sites it would be impossible. Whats the point of a nice new killer website if no one can find it?

In every site I use at least friendly URLs, Google submission and tracking and correct/suitable DOM and META tags.