When two pawns are side by side, they are a phalanx.
When one pawn protects the other, the are are a chain.
Both of those are static configurations. When two pawns can move up the board together going between phalanx and chain, they are a pawn roller. This is a dynamic property.
Pawn rollers can be most effective when each move forward attacks something. That way they move forward with tempo, or with the initiative (forcing the opponent to respond to your moves). Some people may say that it is a required condition that the pawns attack something to be called a roller.
I've read this term several times now but can't seam to really understand what is meant. Could people please give me their definitions.. hopefully one will make sense to me.
Thanks