It's certainly important to show the important bits in your work, to show what a character feels, of what plot development happens and to show the world of your work and so on. But sometimes, it is fine to just tell your audience information that while important, that relevant for them to know but doesn't need to be shown or gone into great detail, as detailing or showing too much can run the risk of bogging down your work or making the audience feel nothing is happening for too long of chunks in your text. Like anything, it's a question of working out when to show and when to tell in your work. Law of Conservation of Detail in any fiction of work is often key no matter what genre, length of story or plot, characters is being done.
