Verified answer

Nothing! It is just a logo so they can brand themselves. (See the symbol and know it represents TDWP for merch)

From an interview with Mike:

"We hired this guy named Cory [Holms] who is a very prominent graphic designer. He did The Soprano's logo and whatnot, so we got him to try and come up with something for us. His idea was a pitchfork and he lofted it up in a circle. We saw it and didn't really like the circle, and it reminded all of us too much of Underoath's 'O' so we took the lines and not to be too trendy but, triangles are very popular right now so we put it in a triangle. We put it right side up, and then flipped it upside down, which is basically what we came up with except we shortened the lines. A lot of people are like, 'What does it mean, what does it mean?' and it doesn't mean anything. Really, the only thought behind it was the lines are meant to resemble a pitchfork."

There is more about it in the interview about why they wanted the logo.

I Heard Somewhere that the Triangle symbol doesnt have a meaning, its just a triangle, plz answer my questions, I need ANSWWERSS!! (^-^)

Tdwp Merch

i believe they are a christian band so maybe the triad between god son holy ghost? I know oh sleepers is a pentagram with the horns cut off.. maybe its something similar