A common phrase used to agree with someone or to buy time while thinking ("that's right," "let me see").
A: 明日は雨が降るらしいよ。 B: そうですね、傘を持って行った方がいい。
A: It seems it will rain tomorrow. B: That's right — you'd better take an umbrella.
うーん、そうですね…。もう少し時間をください。
Hmm, let me see... Please give me a little more time.
そうですね、あの店のケーキは本当においしいです。
Yes, that store's cake is really delicious.