Which best describes 'mobile banking'?

Mobile banking refers to banking services that can be accessed and performed through mobile devices, such as smartphones and tablets. This service allows users to conduct a variety of banking transactions remotely without the need to visit a physical bank branch or use a desktop computer. Examples of mobile banking activities include checking account balances, transferring funds, paying bills, and depositing checks through mobile applications.

The focus of mobile banking is specifically on the portability and convenience of accessing banking services via mobile technology, which enhances user experience and accessibility. Other options do not accurately capture the essence of mobile banking: services accessed via a desktop do not fall under mobile banking; large transaction processing pertains to different banking systems; and limited services at a branch do not reflect the range and capabilities offered through mobile banking applications.