The Keyword Research Bible

Here are few paragraphs from the book,

No matter what kind of business activities you undertake on the internet, there is one fundamental fact that cannot be ignored.

Whether you're promoting internet marketing products, or selling blue widgets from a sales enabled website, you cannot hope to be successful unless people visit your website.

However, having just anybody visit your site is not enough. In order for your business to be successful, you must attract site viewers who are interested in the product or service that you are promoting or selling. In other words, your visitors must be targeted prospects.

For example, if you are the biggest supplier of blue widgets in your locality, it is not going to help your business if everybody who visits your site is only interested in buying red or green widgets.

Similarly, if your site is promoting an internet marketing product that is related to selling on eBay, you’re not going to make many sales if the people who visit your site are interested in advanced search engine optimization techniques.