Using a feature added from iPhone models 6S onward, you can quickly and easily move the cursor around on your iPhones screen.
Just activate 3D Touch anywhere on your iPhones keyboard (tap and then firmly ‘push’ the screen). Keeping your finger on the screen, the letters on each key will fade and the keyboard will turn into a “trackpad” for your finger. Move it around and the cursor moves with it – allowing you to easily jump around larger blocks of text etc.