I'm not familiar with the band Metallica. Are you a fan?
They are actually my favorite band.  The were created in 1981 by Lars Ulrich and James Hetfield
What are some of their songs?
There most well known song is Enter Sandman.  It led to their album selling over 30 million copies
Wow! That is quite an accomplishment. How were they received critically? Did they receive any awards?
They have won several awards since their inception.  Their most recent album Death Magnetic also was critically praised
Are they still performing today?
Yes they are.  There currently touring and the band consists of Hetfield, Ulrich, bassist Rob Truijillo and lead guitarist Kirk Hammett
Wow, they have been around a long time! That's pretty amazing. What is their genre?
Heavy metal.  They are actually considered one of the founding bands of trash metal