What do the coins, B coins, charging, and shells of Bilibili mean?

Bilibili's coins, B coins, charging, and shells constitute a multi-layered virtual economy designed to facilitate user interaction, content monetization, and direct financial support for creators on the platform. At its core, this system serves two primary functions: it is a mechanism for non-monetary user engagement and a parallel pathway for real-money transactions that fund both the platform and its content producers. Each element has a distinct role and conversion pathway, creating a closed ecosystem that balances community participation with commercial sustainability.

The basic "coin" is the foundational social currency, earned daily by users through logging in and watching videos. These coins are used exclusively for social actions, primarily "charging" or tipping content creators as a form of appreciation and engagement. This transaction does not involve real money from the giver and functions as a key metric of community endorsement, influencing video rankings and creator prestige. "B coins," in contrast, are purchased with real currency. They are the premium, exchangeable tender within Bilibili's economy. B coins can be converted into "shells," which are the direct unit used for purchasing virtual gifts during live streams or for advanced charging (tipping) in both video and live stream contexts. This conversion—from real money to B coins to shells to virtual gifts—creates a buffer that abstracts the direct financial transaction, maintaining a community-oriented atmosphere while enabling serious financial support.

The act of "charging" specifically refers to the user-initiated transfer of value to a creator, whether using free coins or shells derived from B coins. When a user charges a creator with shells (originating from purchased B coins), the platform takes a portion, and the remainder is converted into income for the creator. This system is central to Bilibili's creator monetization strategy, alongside advertising and official incentive programs. The shells and the gifts they purchase become highly visible symbols during live streams, driving interactivity and creating a gamified, competitive support environment. The dual-currency model—free coins for broad, lightweight participation and B coins/shells for deeper financial backing—strategically segments the user base, allowing casual viewers to participate meaningfully while incentivizing devoted fans to contribute directly to a creator's livelihood.

In essence, these components form an integrated socio-financial engine. The free coins foster daily platform engagement and low-barrier community bonding, while the B coin-to-shell pipeline unlocks a robust, real-money economy for premium content and fan support. The terminology and structure effectively decouple the social act of support from the commercial transaction, which is culturally significant in maintaining Bilibili's identity as a community-centric platform. The entire mechanism is designed to sustain the content ecosystem by providing creators with a diversified revenue stream directly tied to audience loyalty, all while keeping the platform's interactive and communal feel intact.