You can look up URL parameter structure online, but the short version is that you use ? if it is the first parameter (no other ? in the URL), or & otherwise.
So you can use:
https://google.com/?udm=14and then search for something.https://google.com/?q=question&udm=14by adding it with an&after an existing search
I recommend adding a custom search engine to your browser with this baked in. It’s incredibly easy in Firefox and it’s derivatives, with a ton of tutorials online.



My issue with this illustration vs “the dress” is that in the dress, the background is bright, not a darker blue.
In theory, this illustration just serves to show that nobody should be seeing “the dress” as white and gold. Thy do, and that breaks my brain, but I still feel that there is no logical way for that to be justified (and yes, I read all the research).