A GAN is a Generative adversarial network model that is trained using two neural network models. GANs have very specific use cases and it can be difficult to understand these use cases when getting started.

Here is a great article on GANs that will teach you all you need to know as a beginner.

5 Best Open-Source Projects That Will Teach You All You Need To Know About Best Generative Adversarial Networks(GANs)