As with all of the Potter movies, there are many positive messages, including the idea that every hero needs help to defeat evil; that everyone has a choice to do what's right, even if it's not easy; that some battles are greater than one person; that friends stand by each other until the end; and so much more. Different characters' choices illustrate selflessness, unexpected conscience, finding the courage to express love, and that people aren't always what they seem. And the Forbidden Forest sequence demonstrates how those we love always live on in our hearts, even after they're dead.
Positive Role Models & Representations
This is by far the deadliest of the eight Potter films, with the highest body count and many upsetting deaths. Because the movie depicts the Battle of Hogwarts, the death toll is in the hundreds, including some favorite supporting characters. Their bodies are shown (eyes open, unmoving). The Gringotts break-in not only destroys the bank but also sparks bloody retribution from Voldemort (dead goblins are shown sprawled out). The Killing Curse is used, an evil snake kills an important character in a pretty gory scene with multiple bites and body slams, and a bully is enveloped in fire. Some bodies seem to disintegrate or burst. Harry, Ron, Hermione, and their friends face Death Eaters, Dementors, giants, huge spiders -- the whole of You Know Who's army. In one ethereal scene, the remains of a body are depicted as a gruesome newborn-like creature. Harry willingly faces death at one point in the movie.
After seven movies, Ron and Hermione finally kiss -- as well as hold hands, embrace, and protect/comfort each other in a romantic manner. A married couple holds hands before a battle. Harry and Ginny share a brief kiss, and one character proclaims his intent to tell a girl he fancies her, since they might be dead in a few hours.
Molly Weasley's famous line: "Not my daughter, you bitch!" is included verbatim, and a few characters (mostly Ron) say British slang like "bloody hell," "prat," and "numpty."
There's no product placement in the movie, but obviously Harry Potter-related merchandise is a huge money maker for Warner Bros. and J.K. Rowling.