That makes sense, thank you. I'm also guessing they need to go into the sitemap so search engines discover them, right?
I'm not sure I've ever searched for something and got a different landing page as a result (though maybe I just didn't notice), so I didn't realize this was something people do.
Yes sitemaps are great for search engines. Makes it easy for indexing.
> I'm not sure I've ever searched for something and got a different landing page as a result
That is probably because Google was shortening the destination URL. If you are running Google Ads you can set your own URL destination even though the actual landing page might be something totally different. You can check it out if you like by searching for something and focusing on the Ad. You'll typically have the landing page different from the Ad URL.
I'm not sure I've ever searched for something and got a different landing page as a result (though maybe I just didn't notice), so I didn't realize this was something people do.