When you're having a conversation, it's good to respond to what the other person says. For example:
A: I'm going to Spain next weekend.
B: Cool. That seems exciting!
The phrase "That seems ___" is a useful way to comment on what someone has just said. You follow it with an adjective like "fun" or "difficult".
If you wan to use a noun instead of an adjective, change the phrase to "That seems like ___."
That seems like a lot of work.