After getting one’s first camera and kit lens, the first question that inevitably follows is “What lens should I buy next?”. For any given manufacturer, there’s such a huge variety. And that’s before you even consider the 3rd parties who produce lenses for that system. And, barring speciality glass like fisheye, macro and tilt shift, they generally fall into two categories. Zoom or prime.
Understanding the advantages that each has over the other can help you to make a more informed decision. This video from Craig Roberts at e6 Vlogs goes over those differences. What advantages they offer over zooms, as well as their pitfalls. With this information, it should help you narrow down your choices to at least a type of lens.