I'll try to make it a brief one just to get one thrown in. Good luck Sign Guy.
Twitter
Twitter is a new thing that has been opened up for both the TNA guys, as well as the WWE guys, to reach out to the fans as well as to bring news about various things, as well as to share their own opinions on popular stuff being discussed on the Internet and other places. This is a good thing why? Because the fans are important, and giving them a way to communicate with the people they watch on television on a weekly basic creates for a better bond for the wrestlers to create between themselves, as well as the fans.
Twitter has given the freedom to bring an insight in some of the life for a wrestler. While it might be considered somewhat hurting that we now see that Chris Jericho, or CM Punk in general are not bad guys, but simply playing a role, this is still something a lot of people already figured out years ago. Therefore, it couldn't possibly hurt what has already been broken down to pieces - Kayfabe.
Twitter is popular as ever, and it makes wrestling more than just wrestling, it expands the aspect of wrestling and makes it more mainstream, exposing wrestling in a better way, and overall benefiting wrestling.
Youtube
While I don't believe that the access for professional wrestlers on Youtube is there, the exposure of professional wrestling shows on Youtube, be it "illegal" contend, or uploaded material from the promotions themselves, once again creates for a better exposure of it. There's people that doesn't get Smackdown right now, some might not even get wrestling (Denmark!), and this creates for a better way to get to know the concept, to get to know the wrestlers, and to overall welcome them better and be more excited for them when they pop up on a wrestling show you do have the ability to watch.
As well as it creates for those who can't watch wrestling, or couldn't watch it one night, to still follow it. It becomes an overall better thing because the exposure is unlimited and therefore benefits professional wrestling in many ways, be it potential rating spikes (In the good way) merchandises, or general exposure for other things than wrestling.
Facebook
This is just like Twitter, a way to reach out to the fans. However, this allows for them to be even more exposed. Facebook is the one of the biggest account based things in the world. Facebook is global as ever, and is something pretty much everybody uses. Facebook, unlike Twitter or Youtube allows for fangroups, quizes etc. to be created, something like any of the other things does, is exposing professional wrestling even more. I could mention a lot of the other features that Facebook has similar to Youtube and Twitter, however that would be rather redundant.
Overall
Overall professional wrestling is exposed a lot more through these media's. They are globally popular for everyone, and they allow for everybody to get "sucked" into this. To think that the exposure alone shouldn't be something that was beneficial for professional wrestling to me is just odd.
Because, let's face it, if the exposure as well as all of these media's being used wasn't a good thing, then why would Vince practically have all of his wrestlers make a Twitter account? Why would Vince announce the Twitter accounts on WWE.Com if it's not good for business?
Overall, exposure is the thing that allows wrestling to survive, the fans tuning in and remaining interested is what keeps wrestling alive. Twitter, Youtube and Facebook are good things for professional wrestling, and above states exactly why.