They were one of those bands it was "cool to hate loudly," like Nickelback or Creed. Though Creed really IS awful.
But whether you liked them or not, Linkin Park was definitely a huge influence in the sound of rock in the first decade of the new century.
Their biggest hits were Numb, Faint, In the End, Breaking the Habit, and of course, the often mocked Crawling.