Titles

Titles are used in an opening sequence to introduce a film and the makers behind it. The key institutional information before you watch the movie.  

They are included to give credit to the people in the film making it and funding it. A title sequence often establishes the genre of the movie which is normally down to the fonts, colour scheme, and soundtrack used. It sets the tone and atmosphere of the movie, it can often suggest the location, time of the movie and even hint at the narrative.

The roles traditionally mentioned in the title sequence are who funded the film and the many makers behind it. There are usually 21 titles found in an opening title sequence in a set order.

These are normally the top 21, although they can change: 

1. money 
2. Production
   
3. Directors
4. Main star
5. film title 
6. Actor 1, 2,3,4,5
7. Casting
8. Costume designer 
9. Music
10. Edited
11. Production designer
12. Director of photography
13. Executive producer
14. Produced by
15. Based upon
16. Screen play (writer)
17. Director

Or for example:

A horror film

Certain features of the titles will clearly suggest the tone, narrative and genre. A horror movie like this stereotypically has red (blood) and black (night time) and will normally show you something creepy so you know the genre and are engaged.