"To refresh a room" means to make it look nicer, cleaner, and more pleasant by doing things like cleaning, tidying up, rearranging furniture, and adding new decorations or scents.
Floor rugs are great decorative accessories that can spices up and refresh room decor. (decor4all.com)
3 Keeping larger furniture neutral By keeping larger, more prominent pieces neutral, it's much easier to refresh a room when, and if, you get bored with it. (styleathome.com)