The main reason we learned what the Golden section was is because we are learning typography. So, in typography, the Golden Section is used amongst the relationship between the headers, body, etc. Another way the ratio is used is for cropping images. Basically, the ratio always has to be equivalent to 1.6!!!
The Golden Ratio is also used in logos and of course, layout:
In reality: the Golden Ratio is really important and shapes our work around us but it is a really tough aspect to grasp!
To further your knowledge on the Golden Ration/Section, head to design taxi: http://designtaxi.com/news/379998/Infographic-Everything-You-Need-To-Know-About-The-Golden-Ratio/