What is meant by the invisible style of storytelling?

Invisible style does not highlight the narrative directly, so the editing, continuity editing, camera and sound should be considered ‘invisible’ to the viewers, the goal is to overcome or conceal the two-dimensionality of film.

What is continuity editing?

A system of cutting used to maintain continuous and clear narrative action by following a set of rules so that the narrative has structure, the shot sequence flow seamlessly into each other and so it’s easy to watch the film.