In this case where you would be looking to learn as to what the importance of music in film, you should take note that where music is utilized in a film scene, it would help set the tone. As to how this would be important in a film session is that one could use the type of film that is referred to as underscore which is music that is played before the character is introduced at the time of the rolling of credits before the title card of the film, this music would help to allude to what it is that would be happening next. As to what would be the importance of music in film and which you should take note of is that through its utilization, scenes in a film would not have the feel of the void of feelings at the same time this music would also help to drive any expressions that a character would be intending to show.
You should look to note this other importance of music in film and this is that while this would be big on shaping the emotional responses in a certain film, as to how much would be of great importance as well is that it would help in setting the pace of a particular segment in a scene as well as creating the rhythm at the time. It would be important that you should take note that where music would be utilized in a film, this would have a huge emotional impact on the audience. This would be an experience type that would be transcending with the ability of this to connect emotionally with those that would be watching the film in question.
As to what would be the importance of music in film and which you should look to note is that for the case of the filmmaker, this music would be of great help in reinforcing the story that they would be looking to tell as well validifying the feelings on the type of impact that you would be looking to make. The other thing that you should know about music in a film is that it would not just bring about the emotional impact aspect but also help drive the action and the story that would be in the film. By doing this, when music is utilized in a film, it becomes part of the experience.
As to why there would be the need of you having music in a film is that it could also persuade a prospective audience to watch it. You should take note that music tracks that would be having the imagery of the film would be what would be required.