What is the role of Mendel in "The Fiddler on the Roof"? Character description, does he sing any songs, etc.?

I just learned I'm playing the role of Mendel in the show but I've never seen the show before and know nothing about any of the characters. Is this a good part in the show? Does he have lines? Does he sing? What is his character? Is he in a lot of scenes? I need help!