Meta tags

Why meta tags should be unique for each web pages?

As each web page is unique, it follows logically that meta data describing each page be unique as well.

If you’re talking about the meta description, you don’t necessarily have to include it. The search engines will make up their own description to list under the link to your site if you don’t include the meta tag, and assuming that you’ve structured your page and content properly, what the search engines choose should be acceptable.

Because each page has different topic/information posted and displaced.

Its better to write a description for each page rather than letting the spiders piece on together for you.

True, but Google recently has decided to rewrite the snippets depending on the search query used to rank the page. So even if you carefully craft your meta description don’t expect that the search engines will necessarily use them.

Read more: http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=35264