When asked to recall a list of items in any order, items in the middle of the list tend to be remembered the least.
Placing important information at the beginning or end of a pitch can shape what your audience remembers.
People have the tendency to remember the first and last items in a series best, and the middle items worst.
See the full study here :
Deese, J., & Kaufman, R. A. (1957). Serial effects in recall of unorganized and sequentially organized verbal material. Journal of experimental psychology, 54(3), 180.