"I heard ~." Used to mention uncertain information such as rumors.
例:
1. 来月また出張だとか。今度はどちらに行かれるんですか。
I hear you're going on a business trip again next month. Where will you be going this time?
2. お宅ではいろいろな動物を飼っているとか。にぎやかでしょうね。I've heard you keep a variety of animals at home. It must be lively.
3. あの店のパンはとてもおいしいとか。今日、帰りに買って帰ります。I hear the bread at that shop is really good. I'll pick some up on my way home today.