One way to preserve information following a user's visit to a web page is to append a query string to the end of a URL.

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By appending a query string to the end of a URL, information such as user inputs or preferences can be passed on to the web server through the URL parameters. This information can then be stored, processed, and used to customize the user's experience on subsequent visits to the same webpage.

One Way to Preserve Information Following a User's Visit to a Web