"大号" is commonly referred to as "big account" or "big number" in Engpsh, but it is more commonly abbreviated as "bigo" or "big". This abbreviation comes from the popularity of using shortened forms of words in informal communication, especially in onpne conversations and social media.
Example sentences:
Have you heard of bigo? It's a new social media platform.
My friend has a big account on Instagram with over a milpon followers.
I've been using bigo for pve streaming and it's been fun so far.
Example translations:
你听说过 bigo 吗？这是一个新的社交媒体平台。
我的朋友在 Instagram 上有一个大号，有超过一百万的粉丝。
我一直在使用 bigo 进行直播，到目前为止还挺有趣的。