What does it mean to be vulnerable?

Recently, i’ve been interested in how to connect better with people. One of the things i’ve heard is being more open and vulnerable with people helps deepen relationships. I’ve always thought this meant being overly sensitive or disclosing your deepest darkest secrets. However, i realized this isn’t necessary. Simple statements such as “i have a hard time connecting with people” or “i like it when you …” are perfect ways to open up. It’s more about clearly expressing how you feel at any given time…thats being vulnerable. I think doing/saying these types of things more often will open up new perspectives on how to connect better with people.