Although there are a lot of detailed Clickbank University reviews online at the moment, I want to give a quick overview of CBU and the main alternatives as well.
Clickbank University is a series of online courses for those who are looking to earn money online. It focuses on two main methods – working as an affiliate and building your own products, then getting affiliates to promote them for you. There are advantages and disadvantages to both, but the separate courses go through these in detail.
There are also extras as well – including some tools and access to support from the staff at Clickbank University. Membership costs $49, which is a one off fee. You can pay extra for additional services, but the basic courses are available for a one off payment of just under fifty dollars.
The main alternative is Wealthy Affiliate, but it's much more expensive and has a lot more content. That can be both a good and a bad thing – in my opinion, there is too much to learn with Wealthy Affiliate. Although it pretty much all works, someone who's new to online business will easily be overwhelmed and confused by Wealthy Affiliate, while Clickbank University is much more focussed.
There are other alternatives too – pretty much every week a few more 'make money' courses are released, but most of these are of poor quality and do not last long. Clickbank University and Wealthy Affiliate are officially endorsed and very well established.