Bitcoin mining?

[Dolphins]

What is this "Bitcoin Mining" thing. I dot understand this at all. Can someone explain it to me please? Thanks

 

[Damian]

It's a way for you to waste time and money.

 

[Amp]

Nothing you can successfully do without a lot of investment.

 

[climax]

Earn money by letting your pc run, its pointless

 

[631]

One of my old friend use to talk about this and how much money he makes from it but i don't understand how it works at all

 

[Epidemic]

This is a free way to waste your money and hurt the environment for multiple high prices!