It is affiliated with Sina Corporation and is an online media company serving Chinese communities in China and around the world.

Sina helps users obtain professional media and user-generated multimedia content (UGC) through the Internet and mobile devices through a digital media network consisting of portal website SINA.com, mobile portal SINA.cn and social network service and microblogging service Sina Weibo (Weibo.com), and share their interests with friends. Sina provides featured professional content for local users through its many regional websites and provides a series of value-added services. Sina Mobile provides customized information and entertainment content from the Sina portal for WAP users.

Sina Weibo is a social network service and microblogging service based on an open platform architecture that hosts self-generated and third-party applications. It provides microblogging and social network services to help users connect and share information with anyone anytime, anywhere. Sina provides users with a series of services including mobile value-added services (MVAS), online videos, music streaming, online games, photo albums, blogs, emails, classified information, paid services, e-commerce and enterprise services through the above main businesses and other business lines. Most of the company's revenue comes from online brand advertising, mobile value-added services and paid services.