Photography by its nature is all about light and the capture and management of the light in a scene. Modern cameras are incredibly good at measuring light in a range of different modes such as spot metering and matrix metering.
However you need to be able to understand what your camera is doing and what it is telling you, as well as what to do when your camera gets it wrong.
This may feel a little complicated but understanding this will help improve your images and your control.
How Does a Cameras Light meter Work
What is Exposure Compensation & How to Use it
Putting it Into Practice