A dynamic URL is the address of a Web page with content that depends on variable parameters that are provided to the server that delivers it.
The parameters may be already present in the URL itself or they may be the result of user input. A dynamic URL can often be recognized by the presence of certain characters or character strings that appear in the URL (visible in the address bar of your browser).
You might use URL parameters in your site to perform various functions apart from modifying the content of the page, such as,
- Session ids – for tracking user sessions
- Source trackers – for tracking the sources which are sending referrals to your pages and site
- Format modifiers – for print formats etc
Example of dynamic URL (with paramters bolded):
It is generally my belief that dynamic URLs, with their long strings of random numbers and variables are not as SEO-friendly as Static URLs [link:].