First,let’s introduce the definiton of URL,Accoridng to wikipedia: In computing, a Uniform Resource Locator (URL) specifies where an identified resource is available and the mechanism for retrieving it.[1] In popular usage and in many technical documents and verbal discussions it is often, imprecisely and confusingly, used as a synonym for uniform resource identifier. The confusion in usage stems from historically different interpretations of the semantics of the terms involved.[2] In popular language a URL is also referred to as a Web address. As to URL,maybe most of us just know a little its effect in SEO,for example a dynamic page is inferior to a Static page.However,there are many effects indeed. 1.Level domain name owns the most highest weight. www.goeshare.com is superior to aaa.goeshare.com 2.Secondary domain name is superior to directory aaa.goeshare.com is superior to www.goeshare.com/aaa/ 3.The deeper of the directory of a page,the cheaper www.goeshare.com/aaa/ is superior to www.www.goeshare.com/aaa/bbb/ 4.Directory depth should not more than three. 5.directory ’s weight is superior to the static directory’s weight www.goeshare.com/aaa is superior to www.goeshare.com/aaa.html 6.Static URL is superior to Dynamic URL www.moneyding.cn/aaa.htm is superior to www.moneyding.cn/aaa.asp?a=123 Great,that is it.I hope this advise is useful for you.By the way,happy new year.