GET parameters in the HTTP protocol
In the HTTP protocol, additional parameters can be passed in the site URI. Such parameters are called GET parameters, and the parameter string itself is called Query String.
The presence of GET parameters does not change the page address. You will be taken to the same page, but with parameters that will be parsed by the server.
To pass parameters, a question mark is placed after the page address and the parameters are listed in the format name=value via an ampersand &. See the example:
GET /page/?param1=value1¶m2=value2 HTTP/1.1
Study the URLs of the sites you use. Determine which sites use GET parameters. Try to determine the purpose of the parameters you find by their name.
