sem

What are the differences between SEO and SEM ?

Could you anyone tell me what is the main difference between SEO and SEM? ...

How can I make my mysql database records visible to search engines ? (part 2)

Part 1: http://stackoverflow.com/questions/1749520/how-can-i-make-my-mysql-database-records-visible-to-search-engines I have tried to figure out how to create a site-map for my classifieds website, however, I dont understand the way it works with php and database websites. I have understood that I need all links on a html page, right? ...

How to charge for running an adwords campaign

I've recently been asked to run an adwords campaign. I have no clue how to charge for this. Do I charge monthly/weekly? Do I charge a % of their budget? Do I charge for the setup cost? Do i charge based on the number of keywords? ...