What is bitcoin mining?

Mining is the process of adding transaction records to Bitcoin's public ledger of past transactions (and a "mining rig" is a colloquial metaphor for a single computer system that performs the necessary computations for "mining").

This ledger of past transactions is called the blockchain as it is a chain of blocks . The block chain serves to confirm transactions to the rest of the network as having taken place. 

Start earning free bitcoins by viewing ads click to sign up with coinbulb.com

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Coin Bulb

Coinbulb is a bitcoin PTC website for clients to earn BTC by clicking ads as well as make campaigns to promote their sites or products related to bitcoins.
Click to register your coinbulb account

How to work on CoinBulb:

• is very simple as we do on other PTC sites. The primary way to earn money  is by viewing advertiser's web page.
• To start, you must go to the ads page where the ads will be displayed. A lot of ads will be available with stay time and pay for visiting the page mentioned on the side. The pay will vary for each ad which is directly influenced total time spent on the page.
• You must click on a link to begin viewing the ad. When clicked, the ad will load in a new page. The ad must be watched until timer ends.
• When timer ends, a captcha will load. You must solve the captcha in order to prove that you are a human user and not using any bots to automate the process.
• DONE.... CONGRATULATIONS YOU GOT THE PRIZE it is that easy :)