If you haven't noticed, search engine marketing has exploded over the last few years. As recently as 1997, search engine marketing was hardly an industry. By 2003 it had grown to $1.6 billion almost 28% of all online advertising spending.
Although getting accepted in Yahoo and Google can help your search engine rankings, you are more likely to make sales if you are listed in MSN. Find out how to get your site accepted in MSN.
Latent semantic indexing is a type of technology that works to understand what a page is about. Latent Semantic Indexing is merely one process within Googles complex ranking algorithm but it can affect your search engine listings considerably.