How can I effectively use filler for wood floor gaps to improve the appearance and functionality of my flooring?

To effectively use filler for wood floor gaps, start by cleaning the gaps thoroughly. Choose a filler that matches the color of your wood floor. Apply the filler generously into the gaps, ensuring it is level with the floor surface. Allow the filler to dry completely before sanding it down to create a smooth finish. This will improve the appearance and functionality of your flooring by filling in gaps and preventing debris from accumulating.