This is the ability to think logically in order to find the answers to problems and make decisions. It often involves looking at data and understanding what's important and what isn't. Analytic skill is something that comes more naturally to some people than others, but everyone can improve their ability in this area.
Your ability to analyse will improve with experience as you understand more about the processes you are looking at. Becoming proficient in the use of analytic tools will also help. Learning to code is also an excellent way to make yourself think logically.