Picture a square putting lane to the hole
Picture two lines from the ball to the hole: a thin line for the ball's roll and a thick line as wide as the putter face. The speaker says this toilet-paper visualization helped when face squareness or stroke straightness was troublesome, including taking the putter straight back and straight through.
Channel: Golf with Aimee
Watch official source at 3:47Why this context matters
A visualization the speaker uses while putting.