Used to acknowledge and approve of something. As opposed to '
cool' which may or
may not
clearly suggest approval.
Example 1 (using
cool)
Person 1: I am going to become a giraffe.
Person 2.
Cool.
This might come off as ironic or insincere.
Example 2 (same but using very
cool)
Person 1: I am going to become a giraffe.
Person 2. Very cool.
This comes off as heartfelt and sincere.