It needs some work on the bangs. They're very choppy. If you can get them more even, it would be a big improvement.
Depending on what it's made of, there are a few styling options available. But the material wasn't stated. If it's a costume wig then trim and a VERY light brushing. They tend to want to "fray" (for lack of better) a light spritzing of hair spray will tame them.
If it's a synthetic fashion, then a water bottle and lightly spritz and air dry will bring it back after brushing.
There's literally thousands of types of hair and each has its own care/maintenance characteristics.