Tanking used to be inaccessible because of the numbers game -- mitigation numbers that were hidden away in the great unknown. Players had to rely on the stalwart parsers and number crunchers over at EJ, Tankspot, Maintankadin, and all sorts of websites in order to inform the community about these magic numbers on defensive stats to let a tank do his job. Nowadays, hit and miss numbers are easily displayed for players, and defense as a statistic to worry about is gone forever.
That all being said, the tanking game is still a numbers game, but this time it is more nuanced with the introduction of mastery and the ability to mitigate most damage a tank takes. You've seen numbers being thrown around and you may or may not know what they mean. Well, Visual Combat Table (VCT) is here to make sense of those numbers for you. Tanking is soon to become another hot commodity role to fill in the upcoming Raid Finder, so arming new tanks with mitigation knowledge is always a good thing.
My introduction to VCT started with an email from its creator letting me know about its existence and the role he felt the addon played in the tanking community as a whole. While reading his email, I thought back to my first few weeks of tanking in Cataclysm and realized that for all of the information the game was showing and telling me there still was a great deal that I was struggling with. I wanted more information, and sifting through forum threads wasn't giving me a quick enough answer.