what is the # symbol in the url

Question

I went to some photo sharing site, so when I click the photo, it direct me to a url like

www.example.com/photoshare.php?photoid=1234445

. and w

Answer 1

It is the name attribute of an anchor URL: http://www.w3schools.com/HTML/html_links.asp

It is used to make a bookmark within an HTML page (and not to be confused with bookmarks in toolbars, etc.).

In your example, if you bookmarked the page with the # symbol in the URL, when you visit that bookmark again it will display the last image that you viewed, most likely an image that has the id of 3338901.