Meta Tags
Many people who write their own web pages have never heard of, or seen, META tags.
This is probably because META tags don't make anything appear on the web page. Many of them are intended to help search engines obtain information about your web page.
Search engines try to find the appropriate web page someone is looking for by matching keywords with the contents of the web pages in its database. So when your web site is indexed by a search engine it would be useful to help the search engine by putting a list of possible keywords in your HTML file. Exactly what information will be read by a search engine and displayed in the results will vary. Some search engines "visit" your web site to create their own list of keywords based on what is actually in the text.
There are two main META tags that search engines may read.
The description META tag should contain a brief description of what the page is about, up to a maximum of 200 characters.
For Example: A guide to writing Web Pages.
The keywords META tag should be list of key words used in the page separated by commas. If you want to emphasise a particular aspect you can repeat the same keyword several times. There is no limit to the number of keywords you can include, but more than 1000 characters is considered spamming.
For Example: tags,URL,FTP,web design,etc...