"[1] Tevye and Golde's daughters sing about a matchmaker choosing a partner for them.
Hodel and Chava sing excitedly about their future marriages, arranged by the matchmaker, Yente.
However, Tzeitel, the eldest daughter, warns the others that, as they are from a poor family, they'll have to marry whoever Yente brings for them, regardless if it's an unhappy marriage.
[2] The blog Sermons From Seattle explains "The story [of Fiddler] is that the matchmaker is to meet with the mother and father and match their three daughters to prospective husbands.
[3] This song epitomises the more traditional views regarding this issue that the daughters question at the very beginning.