Rooting allows you to perform super user specific tasks. For example, if you need access to the internal file system, or you need to run app that require super user (Super SU) access, you will need to root your Oppo N1 phone. Here are the steps on how to Root Oppo N1.
First, install TWRP / CWM on your Oppo N1. Then, install this APK on your phone. Then, fire up Play market, and install Super Su app from market. You will find Super Su on your phone after installing the apk. You can optionally install busybox too.