Another reason why ignoring her is a good thing is the fact that it gives you a chance to move on with your life. You can start to move forward and do the things you need to do to improve yourself, improve your situation and just improve everything about yourself. Once you have made these positive changes and she starts to see that she will start to see you in a different light.
The last reason why ignoring her is a good thing is the very fact that women hate to be ignored. In the case of getting her back, giving some space is ultimately what is needed, but outright ignoring a girl will have her chasing you faster than a kid after an ice cream truck. If you have dated for any amount of time then you will know that women like to talk and if you are not there to listen they ultimately begin to miss you.
If you want to get her back then ignore her. I hope that you can see why steering clear of your ex is a good idea. Once you give her some room and some time you will start to see things become clearer. Ignore your ex girlfriend if you want to get her back and you will see that things will work out in your favor.
You may like to read : how to get keys back from ex