If you want to market a product the advertising is a necessary thing.There are various online advertisement methods now.The advertisement of site is also a way for making money.
SEO-Search Engine Optimization, blogging, article marketing etc are famous site advertising methods.Now online advertisement is more poplar than offline advertisements.Paid advertising gives instant results.One more advantage of online advertisement is that it is, much more popular than text based messages such as classified ads, articles, etc.