

This will happen when the keyboard suggests the words.

Predictive words on a keyboard have their own effects, sometimes it disturbs like you’d lose your passcode or any secret message, but in some cases, it can be helpful also. For example, if you have typed your email with the password, you don’t want to show in on predictive text to someone else, when anyone uses your device, he may find your password and email. Those predictive words that appear on the top of the keyboard sometimes can help you to type fast but in some cases, there might be appear something special like password of your account.

Thus the keyboard history or simply keyboard cache are the used words on your device, then it will be saved as a cache on your device history, and they will appear automatically as a predictive text next time. While using the keyboard, the keyboard will simply store them which is also called cache. The modern phones whether it’s Android or iPhone or tablet are capable of keyboard by which users can search something or type a text.
