Do I need a unique post meta description

[acs111]

Just wondering what the best practise is for unique meta desriptions on blogs.

When I post a blog on my wordpress, clicking the title takes you to an individual page with that blog on it.

I understand how important the title tag is on this page but when I create a meta description:

a) is it useful?

b) Should it be unique or is it ok to copy part of the post and insert that as the meta tag?

Thanks

[TakeshiYoung]

The meta description is not used for rankings and does not need to be unique.  However, Google often uses it as the description of your site that shows up in the SERPs, so you want to make it descriptive to entice searchers to click on the link.  Think of it like the copy for an AdWords ad.

[crimzen]

I agree that the description is very important to entice users to click -- if a keyword searched on shows in your title and again in the description it is bolded creating impact.

One thing that gets me though is all these tools that promote "unique" title tags, meta descriptions and use it as a page grader -- you get an F if you don't have a unique meta description.

So I try to make it unique.  It may be .005% of an overall page score but at least your paying attention to it.