How do I pay with BCA?

Excuse me, could you please elaborate on the process of paying with BCA? I'm interested in understanding the steps involved and any specific requirements or considerations I should be aware of when making a payment using BCA. Is there a specific platform or application that I need to use? Additionally, are there any fees associated with making payments through BCA, and if so, how are they calculated? I appreciate your assistance in clarifying this for me.