Search Engine Optimisation tells the search engines what it needs to know about different websites, it tells them what the page is about in broad terms and also in exact details, this is one of the main factors that will determine where in the search engine rankings you will show up.

The other major factor is links, links are like votes to your site from other sites that deal with the same subject, so if I needed this page to rank really well I would need links back to it that were related to internet consultancy Dorset, this would be seen as a very positive vote for my site from the other sites about search engine consultancy Dorset and I would get ranked for the term higher in the search engines.