Scene Composition
In the visual arts, composition is the placement or arrangement of visual elements or 'ingredients' in a work of art, as distinct from the subject. It can also be thought of as the organization of the elements of art according to the principles of art.

The term composition means 'putting together' and can apply to any work of art, from music to writing to photography, that is arranged using conscious thought.

Key Composition Rules
180 Degree Rule

Rule Of Thirds
Symmetry (ForCharacter Feeling Powerful Moments)
Leading Lines

Depth - Fore Ground / Mid Ground / Back Ground
Character Size Equals Power (Over the shoulder or Hi/Low angle shot)
Character Viewing Space / Direction
Character Head Space
Negative Space

At the end audience will NOT remember how good was that 27th shot of your movie, they will remember how overall your film affected their feelings. So use these framing or composition rules wisely.

Scene Blocking
Blocking a scene is simply “working out the details of an actor's moves in relation to the camera.” You can also think of blocking as the choreography of a dance or a ballet: all the elements on the set (actors, extras, vehicles, crew, equipment) should move in perfect harmony with each other. so that moving crew and equipment in the subject background cannot appear in composition frame.