How far the url structure of a web page impact the search engine ranking of the page?

[RoyMoon]

How far the url structure of a web page impact the search engine ranking of the page? what should one keep in mind while constructing or renaming urls of a website.e.g.

****.com/blog/post/2009/07/21/From-Amateur-email-marketer-to-Pro.* - is this a good url structure?

[MediaPrecision]

The URL's are important to a degree for the structure of the URL.... I have a client who has 2 sites. both sites sell the same product. one is an established pr3 site with no seo friendly url's installed. The other is only 2 months old, but has seo friendly urls. the new site ranks higher that the old site for each product.

[Ace]

URL Structure plays a key role in your SEO efforts. So be careful in while deciding your URL structure.

[EAG]

the domain keyword has most of the effect, however only google knows for certain how much.
what you need to do is exploit all the factors that contribute to SEO

[shubh]

search engines don't wish to crawl Web sites with too many parameters in the URL. Search engines limit the number of characters they'll crawl in a URL. This is partially due to known problems in URL structures and partially to Web site usability. Avoid using numbers as opposed to using descriptive and title of the content in the URL.The URL structure should be as simple as possible and constructed systematically as well as being comprehensible to users. That is using clear words rather than long parameters.