Macro photos means pictures of small objects taken at a lose range. This makes you see some parts that may not be visible to the naked eyes.
Let's say you want to take macro photos of a fly using a mobile camera. You know that when you near the fly, it will run away. Hence, the need for lens. There are certain clip lens that can be purchased that will do the work. This lens will make you get a more complete shot from far areas without reducing the quality. You also need to find a stand where you can place your mobile phone to prevent shaking that may lead to blurred pictures.
Then toggle with your phone settings to focus solely on the object or insect you are capturing. It may seem difficult at first but applying the right lightning and focus. You will get the awesome macro photos you want.