Are You Ready To STOP And THINK?!

What is the exact function of the 'like' button on Facebook? A Facebook friend shared her Facebook friend's post recently, here it is below: 

I've always wanted to ask what the like button on a Facebook post is meant for?

Does it have the same meaning as the everyday English word like or does it have a different meaning?

I'm always baffled when I notice some posts which are quite saddening or offensive or threatening are liked by some individuals.

Eg: someone just died 

👍

I'm going to kill 10 people today 

👍

So so so person is a bloody fool 

👍

Or do people don't read the post and just want the "poster" to feel good about himself or herself that the page/topic is trending 😕😕

Why do you 'like' posts? Just think about it. 

Liking isn't helping!