More specifically, the methylcobalamin form of B12 is recommended, as it has been shown to be the most effective. Taking B12 gives you a huge boost of energy while training, and more importantly, greatly helps your recovery.
As the name Standard Cycle suggests pretty much anyone can employ this strategy and it is often recommend to newer users because the results it gives are very good (note it is the same as the first cycle approach).
The 10-12 week cycle approach can be used for bulking or cutting for both new and experienced depending on compounds, training, and diet. This time period leaves a lot of options for compounds so users have very few restrictions in terms of drugs. Training and diet is covered at length in other places so I will leave that up to you. I will say that training and diet are paramount to attaining your results regardless of what you are running in terms of gear.