What's "depend on" mean and when's it used?

Native speaker’s answer
Rebecca
"Depend on" means to rely on someone or something. To need someone or something for support or help. It can also mean expecting something from someone. Ex: Can I depend on you to be at the party tonight? => expect and rely on Ex: He no longer depends on his parents for support. Ex: I depend on my dog for emotional support. It's like pet therapy!