Mobile proxies act similar to residential proxies. It is essentially one IP address that is obtained from mobile operators like Vodafone, T-Mobile, AT&T, Verizon. 

Such a proxy does, however, use mobile data, as opposed to a residential proxy that uses broadband ISPs and home Wi-Fi. 

Mobile proxies are ideal for various automation purposes as well as ad verification, enhanced privacy, scraping and security during browsing.