Why do some people's Facebook chat names show 'last active' numbers?

You can see last active 2m ago or something similar to this but not with exact time like Whatsapp does. Messenger app tracks your last seen and sets this as your last active, you can only see last active for those people who are using Facebook messenger. If you want to turn off this setting for your account, Open messenger on the top you'll see 4 Icons, Tap on to the 3 Icon left to settings icon, Under this tab you'll now see 2 More tabs, "Messenger" "Active" Tap on Active where you'll see your Name Turn it off.

THIS IS THE SOLUTION  in 2 minutes DISABLE LAST ACTIVE/ACTIVE  feature in facebookwith this trick you can connect and your friends will not knows if you are actually connected  and you can remove the last active feature with it

I think those numbers are only for messenger users. they won't display any number for the users who access facebook through Laptop or PC.

What follows is satire, and not particularly funny satire. At least, I hope it’s satire. Is it?You’ve asked the question Facebook wants you to ask. It wants you to think this question, and questions like it, are very important to you and your life.This is an important question.This question currently has more followers than any of the hundred questions I’ve been asked on Quora (true story).You have asked an important question.Now go stare at something.The address of the headquarters of Facebook is 1 Hacker Way. Facebook openly promotes itself as a hacker culture. Its job, according to its own slogan, is always just 1% done.Did you get that memo? Facebook, which has literally infiltrated nearly every aspect of our lives, is only 1% of the way on its journey into our lives. According to my back-of-the-envelope calculations, by 5% (which will still be just 1% to it) it will be our lives.Whoah! Just got a like. Need to see who that was. OK, back.Facebook, by its own admission, means to hack into everyone’s lives in the most open and overt ways technologically possible, under the pretense of communication and connectivity, making it simultaneously the most unambiguously discreet operation on the planet.Omg, pure lol! That used to be the way old religions described the Devil. Besides, we know the name of the Devil, and it’s Kaiser Soze.J/K (Rolling, on the floor laughing, that is.) Obviously, no one believes in Kaiser Soze. He’s just the Boogie Man to scare little children.Keep staring.FACEBOOK is an anagram, and a redundant one at that, going out of its way to say the same thing twice (where have we seen that before? brb, I’ll check my timeline.)Be Fake OoC (Out of Character).Either that or their COO Ms. Sandberg is a hologram.What’s that mean for us, whose lives have been graced by Facebook? It is a utility for humans, who are of the only affectation-oriented species on the planet, to simultaneously exhibit their true colors while otherwise posting an entirely fictional or fraudulent persona.If we as a species are really and truly going to go down this road, all I ask, really ask, is that you add me.Haha! Fooled you. I’m already maxed on my 5K friends.Ask me questions on my YouTube channel, PermanentWavesTV, or through #AskDrunkJesus and I will answer them directly.Thank you and please Subscribe to stay tuned to answers to your questions!Sankara SaranamPlease Subscribe: https://www.youtube.com/c/Permanentwavestv?sub_confirmation=1Multi-award winning author of God Without Religion:http://amzn.to/29l9eUY