Keyword advertising is a method of advertising on search engines using keyword research. By determining the keyword searches that are most relevant to your business's offerings, you can then bid to place your ads in the search results for relevant keywords. For example, if you sell footwear, you can make sure people searching for keywords like "sneakers" or "women's boots" see your advertisements. Almost all of search marketing revolves around keywords. Choosing the right keywords for advertising can make or break your ad campaigns.