I really quit thinking about them a long time ago. To attain visitor traffic to your website you must understand how traffic flows throughout the internet. This understanding stems from the basic algorithm of the Internet and the goals of it's original creators. The goal of the creators was to link the knowledge of mankind together by using hyperlinks. You can be on one page of content and click a link, to be sent to another.
Links point to sites or pages of similar content.
You must understand links and their importance to traffic. Understanding Meta Keywords Adding keywords simply requires editing the HTML code and adding the meta tags, as in the following example.