(I'm) (so) glad to hear it/that
A phrase used when one is pleased by what someone else has just said. A: "We had a great time at your party last weekend." B: "Oh, I'm so glad to hear that!" Oh great, glad to hear it.
(I'm) glad to hear it.
a phrase expressing pleasure at what the speaker has just said. Sally: We have a new car, finally. Mary: I'm glad to hear it. Tom: Is your sister feeling better? Bill: Oh, yes, thanks. Tom: Glad to hear it.