Liliputing has put up a rather comprehensive rooting guide for the Google Nexus 7 tablet, in addition to helping you unlock the bootloader as well as install a custom recovery software just in case anything goes pear shaped. The video above is 11 minutes plus long, so if you have that kind of time to spare, you might want to check it out before doing the same for yourself. Basically, once you are done rooting your Google Nexus 7 tablet, the possibilities of its functions are more or less expanded to levels which were previously inaccessible, no thanks to the unrooted status. All right, head on here or hit the source link for the entire walkthrough listed down in words, which would come in handy if the video above needed some clarification.