Ever noticed that when you share a link from Facebook on your phone, the URL sometimes ends with (or &_rdr )?
You're not alone. Let's break it down.
That's Facebook's mobile web version (not the app). It's designed to work in your phone's browser (Safari, Chrome, etc.).
That " _rdr " Thing in Your Facebook Mobile Link? Here’s What It Means.
It stands for "Redirect" – specifically, a server instruction that tells Facebook, "Hey, this user just landed on the mobile site. Check if they need to be sent to the app, the desktop site, or a different page."
