Twitter, what does this mean?

claire21

Transformulas uses TrueTwit validation service. To validate click here: truetwit.com/vy259528441
10:32 PM - 07 Oct 13

Had this email, I entered a comp with them, when I click the link it wants me to sign up to something?

LadyMorticia

It's basically a company's way of making sure you're not a spambot. When you "sign up", I think you're just saying you're a real person. I've had it a few times before. It's nothing to worry about.