Meta Description

The Meta Description tag isn’t relied on as much by search engines
today, mostly because of web designers packing them full keywords
(also known as keyword padding). Several major search engines use
them and you should too. However, keep it light and simple; use your
keyword or keyword phrases sparingly in them. There isn’t a lot to
say about Meta description other than they do help describe the page
content, so I suggest to use them and to keep them short and relevant
to the page content. I personally do not attempt to repeat the contents
of the Meta title in the Meta description but rather create a short
summary sentence that compliments the Meta title and page content.
No use in penalizing the web page you are creating but padding the
Meta description with a lot of keywords and keyword phrases.
Many new web designers and webmasters make the mistake of using
the same meta description on every page on a website; this is not
good at all. Each page should have a unique and descriptive meta
description. If the web page is about Photoshop Tutorials, then the
meta tag should have that information in it, and in the case of
Photoshop the manufacturer should also be included to enhance the
pages relevancy to Photoshop.