Search Engine Optimisation, or SEO, is an essential core part of the online marketing strategy for most online businesses. Search engines have become the primary vehicle for finding information on the Internet. So, if you're serious about your business, it's time to get serious about search. Every day over 400 million searches are made on the world's leading engines such as Google, MSN and Yahoo! and every one of these is a potential customer looking for a specific product, service or topic.