The document discusses different types of online advertising and how they can support various types of businesses. It outlines the needs of businesses to attract customers and generate sales. There are different categories of online businesses and various types of online advertising models like paid, free, pay-per-click, pay-per-impression. The types of advertising are matched to example business types and can generate revenue or customer traffic. Online advertising is described as cost effective, targeted, measurable and able to reach a wide audience.