One of the services Wireframe Media offers is SEO and SEM. So what are they?
SEO is search engine optimization of your website. These are specific changes we make to your website, making it search-engine friendly for Google, Yahoo, Bing and other search engines. Without these structured changes, your website may not be found at all in searches.
SEM is search engine marketing. This is marketing your website using a variety of mediums and methods to get you the highest ranking with search engines and help people find your website during searches.
Both are very time consuming and it is difficult to achieve good results without a lot of effort, which is why it is a paid service and something most clients don't want to do themselves and don't have time for.
Here is a great article which tells more about what SEO is and how you can use it to help promote your website.