360 Total Security Premium is an antivirus software that offers comprehensive protection against various types of malware, including viruses, Trojans, worms, and ransomware. It also includes a variety of optimization tools to help improve the performance of your computer, such as disk cleaning, system cleanup, and startup optimization. Additionally, the software includes a real-time protection feature that constantly monitors your system for any threats or suspicious activity, and a sandbox feature that allows you to run potentially dangerous programs in a secure environment. Finally, the software also includes a firewall and a VPN for additional security.