Generic, used across all platforms. For platform-specific terms: 微信名 (WeChat name), 抖音号 (Douyin ID), 用户名 (yònghùmíng, formal 'username' in registration forms), 昵称 (nìchēng, 'nickname' in app UI menus).
culture
Chinese 网名 culture loves quirky or poetic nicknames over real names: 一只小猫咪 ('a little cat'), 月光下的猫 ('cat in moonlight'), 夏目友人帐 (anime references). Real-name display is required for verification (实名 shímíng) but most platforms still let you display a 网名 publicly.
