What is meant by TextInput on an iCloud Storage?

When it comes to a TextInput, it is basically a normal part of an iOS operating system. There is a small amount of data that is written on iCloud by iOS keyboard to TextInput. It can be accessed easily by devices through which you have logged in the Apple ID.
There is a user dictionary data in TextInput. It includes the user-defined Text Replacement fields. TO VIEW THEM, Navigate Settings -> General -> Keyboard -> Text Replacement.