Google's spider1 comes to your website, selects one of the page from your website and saves it in a temporary database. Google's spider save the URL, the web address, and the text content of your webpage. Google does not store any of the graphics, photos, logos...
Once the webpage is crawled by Google's spider, depending on the page rank of your website, your webpage will be indexed and ranked and eventually be placed in the search results. One of the criteria for the ranking is the URL.
With Google, you do not go UP in ranking, you only go down in ranking. Do you match all the criteria? Then you will have a top ranking. Your website doesn't follow Google's way, you will get minus points, and go down in ranking.
You will get -1 point for foto-biz.com/dokuwiki?id=076598723T95827, but with http://www.foto-biz.com/Seo/Urls-part-1 you will not get penalized. According to SEO for bloggers from Matt Cutts, the "head honcho of the web spam department" at Google aka Search Quality Control, you should have the URL paths with keywords in them. Use dashes (hyphens) are preferred over underscores to separate words. URLs with no space between words is a bad idea because you will be penalized.
1 a small program that captures your web pages ↑