The keyword meta tag is used by seo specialists many times just as a reference. A place to list the keywords that a page is optimized for. Nothing more than a reference.
There are more legitimate uses for the tag. In some applications, usually within a companies intranet site, search systems can be set up that utilize this tag.
The keyword meta tag seems like a useful aspect of search on the surface, but thinking about it, how could it be effective with billions of web pages? It really does make sense that the se's do not use this tag when you factor in what they are trying to accomplish. It take more than a list of keywords to have a page rank well. (Plus, the keyword meta tag is too easily abused.)
Many other thousands of pages are going to have these same keywords on them. How would the search engines utilize the keyword meta tag to perform with reasonable results?
When you go to Google/MSN/Yahoo/Ask you expect to find relevant pages to assist you in getting things done. You expect the search engines to give you quality pages instead of crap!
To do this isn't easy. You may feel that you wish that it was, but if it was, search would yield meaningless results and therefore people wouldn't use search the way they do now.
Where would this leave you and me? Floating on the sea with a search plane looking for you. That is where your Web site would be anyway.
There is no magic button (as many feel meta tags are) to get you listed in search engines. It takes time, patience, and most of all knowledge of how to do it. If you want to learn SEO you need to go to
High Rankings forum. You will learn a wealth of knowledge there.
WebMaster-Talk is the forum for Web Design/Development and Coding. For Specific SEO info you really need to go to High Rankings. They have great information for beginners. Must reads for anyone interested in SEO.
Learning seo isn't limited to seo specialists. Unless you have resources to spend thousands of dollars a month, a business owner that plans on utilizing a Web site as a revenue source, must learn about seo. Not to say that a small business shouldn't have an seo consultant. But, one needs to understand the process to be effective.
There are a lot of myths out there. There are also many ways to get your site banned if you don't know what you are doing. Even by trusting an seo. Never trust.. You need to understand yourself, or else, you may end up with an seo professional who isn't honest. Many, Many exist.
Don't just learn seo. Learn good seo.