What's "call on" mean?

Native speaker’s answer
Rebecca
Here, "call on" means to make use of someone or something for help. "Call on" can also mean visiting someone to spend some time with them, usually not for more than a day. Ex: My brother said to call on him if I need help with the bank. Ex: Jane's going to call on Maria today. => to visit Ex: I told my team they can call on me if they need anything.