Internet commercials can be divided into three categories:
Banners and links
Search Engine Optimization services
Banners and Links
Not that long ago banners were a popular type of commercial on the web. But since less and less people started noticing it, and even fewer actually click on it, banners grew ineffective. Furthermore, it requires constant spending or participation in banner exchange sites. The latter is not quite suitable for commercial projects as a potential client might see it as a need for you to earn extra money due to a failing primary business.