In addition to the weighted average vote displayed on all title pages, a more detailed demographic breakdown of votes is also available for every title in the database by clicking on the number of votes.
Votes are broken down by gender (male vs. female), age groups and nationality (US vs. non-US users). Some titles also have a category called IMDb Staff, which includes figures for the votes cast by IMDb staff members.
IMDb Staff votes have absolutely no special influence over the film's average rating. They have the same weight/effect on a film's average rating as the votes cast by regular users: we simply show them in a separate category for informational/entertainment purposes only, so you can see what is our staff's average opinion of the film and compare it with your own.