SPOILERS, please don't read if you haven't read this book yet.
- Harry marries Ginny. Ron marries Hermione. They all have childrens.
- Voldemort is dead.
- Harry is alive till the end.
- Hogwarts doesn't opens. But some major plot happens at Hogwarts.
- Snape and many other get killed in this book. Snape was not bad, he was at Dumbledore's side.
- Umbridge appears in this book.
- Hallows are magical objects, believed to kill anyone. Harry tries to find Hallows and Horcruxes, but he had failure.
Read more at Wikipedia .
Oh... It is end of an era. I'm a bit sad and happy, too. But No More Harry Potter Books!!!That's something hearbreaking. Anyway, enjoy reading 100 times :-).