A keyword is an essential part of Search Engine Optimization or SEO. When you search for information online, you start by typing a word or set of words into your search engine. This word or phrase is considered a "keyword" .
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Keywords are needed to help people find information online. Savvy webmasters research the keywords to insert into their pages to help them get more traffic.
Finding Keywords Using Wordtracker
This video talks about how to find the right keywords for your website. He uses Wordtracker to demonstrate how to do proper keyword research. If the search engines notice that your keywords don't match your website content you may be penalized. Wordtracker is a highly regarded keyword research tool and is a free resource.