What are the best techniques for applying wood floor putty to fill in gaps and imperfections in hardwood floors?

The best techniques for applying wood floor putty to fill in gaps and imperfections in hardwood floors include:

1. Clean the area thoroughly to remove any debris or dust.
2. Choose a putty color that closely matches the wood floor.
3. Apply the putty with a putty knife, pressing it into the gaps and smoothing it out.
4. Allow the putty to dry completely before sanding it down to be level with the floor.
5. Finish by applying a sealant or finish to protect the repaired area.