What is a Query String?
Query strings are additions to an URL that pass on specific request parameters. For example, you can have a query string that requests a particular file version.
More About Query Strings
Query strings are easily recognizable in URLs. If a URL includes a question sign, the query string is the part of the address that comes after it.
Here’s an example:
In that case, you’re requesting a specific version of a CSS file. Versioning is a common tactic among WordPress developers to bypass caching issues.
By indicating a version using a query string, you can prevent loading outdated file versions. That can happen from your caching configuration or through a Content Delivery Network (CDN).
There are two ways to remove query strings from WordPress URLs. One method involves adding code to your website, and the other uses a plugin to remove the strings from URLs.