Sharpness
You can lay the focus on an object in a picture by making it sharp.
When deciding you want to make an object sharp and point of focus in your picture, pay attention…
- on the point which you want to be sharp
- to the amount of light
- a clean lens
- movement of the object, yourself and the camera
When making a picture with your phone, almost everything is sharp.
Not everything needs to be sharp in a picture.