This article explains what it means when a Snapchat message says "pending," what causes the message to appear, and how to bypass the error so the app works properly again.
Why does it say 'Pending' on Snapchat?
A Snapchat pending message is a type of status or error message within the Snapchat iOS and Android apps. A Snapchat "pending" label typically appears beneath a friend's name in the Chat tab, beneath a friend's name on their profile, and within a DM or conversation.
Then why does it say "pending" on Snapchat? Because Snapchat couldn't send it.
Unlike a general error message, a Snapchat warning means that the app will continue sending until the email is received or until you decide to manually cancel the whole process.