SEO is the most tricky word in the Iternet Marketing today.
Lets make it clear, SEO stands for Search Engine Optimization, which means the person who's taking care of your website will make sure your website is indexed properly for all the search engines, so any time a search engine visits your website it can read all  through it and understands your products and services completely.
So the SEO is one of the most important part of your website and should be handled by professionals. But if you want your website to be shown on the first page of the search engines (Like Google, Yahoo, Bing, ...) you need to make the search engines visit your website more often, the more your website visited the more of the ranking you'll get and the more closer you'll get to the first page of the search engine.
Ask our professionals about how we can help your ranking.