Https M Facebook Com _rdr __link__ Direct
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."
Ever noticed that when you share a link from Facebook on your phone, the URL sometimes ends with (or &_rdr )? https m facebook com _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.). It stands for "Redirect" – specifically, a server