APPLE INSIDER
It takes some getting used to, but if you dislike typing on an iPhone, you can slide your finger across the keyboard to enter text instead.
Slide to Type is on by default, you just swipe your finger over the keys to use itApple is oddly inconsistent over what this helpful typing feature is called. At times, it’s known as QuickPath, at others it’s about swiping to type. And the setting on your iPhone refers to it as slide to type.
Source: APPLE INSIDER