The checkered pavement has traditionally been used in many Masonic lodge rooms and buildings. It is not simply a decorative choice but has a deeper esoteric meaning. Inside of lodge rooms it is usually in the center of the room, on top of which the altar is positioned and where the initiations occur. The black and white tile is also oftentimes decorated with indented tassels along the outside and a blazing star in the center.
The black and white tiles are emblematic of human life, that is checkered with good and evil. It is symbolic of the duality of life, as well as the balance that can only be achieved when both are present. This balance indicates that the Mason has a strong and solid foundation on which to build his life.
More Info:
https://scholar.harvard.edu/files/seyer/files/eyer_mystery_mosaic_pavement.pdf
https://www.hamiltondistrictcmasons.org/upload/lecture_file87.pdf