Master of Puppets, which comes from Master of Puppets album (ironic, right?) is probably the most succeeded song of all time for Metallica. Also, it is more than just a song, it is like the last piece of memory of Metallica about Cliff Burton, the no-longer bassist, the former member of Metallica.
The tragic death of Cliff Burton occurred while they were on Damage Inc. tour, and when they were passing through a mountain area in Sweden, the bunk tripped, and Cliff was crushed to death.
The song Master of Puppets' riffs were actually written by Dave Mustaine, a former member of Metallica and now is the rhythm guitarist for Megadeth. The riffs were modified by Kirk Hammett and the bass part was rewritten by Cliff Burton.
As seen in the video is the show on 89' tour of Metallica. This show was considered to be the best show of Metallica.
Master of Puppets is a classic Thrash Metal song with 172bpm speed, which makes the most calm people become rebellious and overjoyed. They start the song with the strong power chord, comes with a drum beat. Right after that, the chop-down riffs start and the speed of it makes everyone want to put their hand on the table, take a knife and chop it off if they want to play(believe me, I tried to play it while standing, but I can't do anything to not make my hands tired. The riffs are freaking hard!).
The solo is what I like the most. It's not very hard, and actually, it's just overrated in the side of difficult. The technique required to play it is not so hard to get, yet you need firm hands and good catching to play it right.