There are not a lot of ways to root nexus 7 and the most common and authentic ways are listed and explained below.
Root it manually
If you are a professional and have extensive knowledge about gadgets, you may consider rooting your nexus 7 manually. If you are a user at XDA developer forum, this is the method for you. But if you are new to all this and are going to root a device for the best time, try not to use the manual method and try others way of rooting nexus 7. In addition to that, you can use this method if you really want to understand this process and want to learn from all this. Rooting manually will allow you to study the rooting process in detail.
Use a toolkit
There are several tools in the market that allow you to root nexus 7. However, not all of those tools are authentic and safe to use. So the best option for you if you are looking for a toolkit to root nexus 7 is the Nexus Root Toolkit. It is the best toolkit to root your tablet as it uses a graphical process to root the gadget. It simplifies the rooting process to a great extent and it makes things a lot easier. If you are not a developer and are rooting your nexus at home, this is the best possible method for you.
Watch a video
If you really don’t know a thing about rooting process and you are new to this, try the visual guide. You can Google the video titled as Idiots Guide to Unlocking & Rooting the Google Nexus 7 Tablet video. You can watch the step by step virtual guide to root your nexus 7. It is the easiest of all the methods and the most recommended one if you are not a professional.