Query string

A query string is a part of a website's address that comes after a question mark. It usually contains information that helps the website know what to show you.

Let's say you want to search for a video on YouTube about cats. You would type in "https://www.youtube.com/results?search_query=cats" into your internet browser. The part after the question mark, "search_query=cats", is the query string. It tells YouTube to show you videos that match the word "cats".

The query string can have different parts separated by an ampersand (&) that give even more specific information to the website. For example, on an online shopping website, the query string might include information about what category you want to search in (like clothes or electronics) or what price range you are interested in.

So, the query string is like a secret code that helps the website understand what you are looking for and shows you the right information.