Quote from: Caesar-Giulius on February 26, 2017, 12:38:51 PM

You can start from here:

https://en.bitcoin.it/wiki/Mixing_service

Using bitcoins is an excellent way to stay anonymous while making your purchases, donations, and p2p payments, without losing money through inflated transaction fees. But Bitcoin transactions are never truly anonymous. Bitcoin activities are recorded and available publicly via the blockchain a comprehensive database which keeps a record of bitcoin transactions. And when you finally use Bitcoin to pay for goods and services, you will of course need to provide your name and address to the seller for delivery purposes. It means that a third party can trace your transactions and find ID information. To avoid this, such mixing service provide the ability to exchange your bitcoins for different ones which cannot be associated with the original owner.

Prior to the advent of trustless alternatives, mixing services (also called tumblers) were used to mix one's funds with other people's money, intending to confuse the trail back to the funds' original source. In traditional financial systems, the equivalent would be moving funds through banks located in countries with strict bank-secrecy laws, such as the Cayman Islands, the Bahamas and Panama.

When mixing bitcoins, you send your money to an anonymous service and, if they are well-intentioned, they will send you someone else's tainted coins. So, now, whatever those coins were used for may now be traceable back to you. Additionally, mixing large amounts of money may be illegal, being in violation of anti-structuring laws.

Did you type all of that or just copy pasted?

Quote from: ZeyadS on February 26, 2017, 11:37:20 AM

I'm kinda new to bitcoin, so can someone tell me what's bitcoin mixer?

When you receive considerably large amounts in several bitcoin addresses and those are known addresses and you want to move them all into one final destination address without people finding out that those funds all ended up in one place, you'll use a mixer.
When you have stolen bitcoins and want to stay undetected by exchanges while trying to launder the stolen coins by trading altcoins you'll use a mixer.
Those are the 2 important use cases of mixing services.