Most of the business or corporate houses of the entire world use the service of the SEO for expansion of their business. Search Engine Optimization and the inbound agencies constitute the major chunk of the service rendered for the operations involving the internet. UK and US are reported to be using the largest number of employees with the companies of SEO of the world. The cost of the service of these SEO companies is mainly determined by taking into account the daily working hours of the personnel of the companies, in majority of the companies all over the world (including US and UK).