Using a Line Block and String Line for Straightness

What happens here

After setting the corner block, a line block with a string line is used to guide the placement of subsequent blocks, ensuring they remain straight and aligned with the established corner. The string is wrapped once and then a second time around the line block, locking it securely in place against the corner block. The presenter explicitly shows that failing to level and use a string line will result in a crooked, misaligned wall that won't line up correctly.

Goal: Maintain straight and aligned block courses using a line block and string line.