Vibhuti is the ash that is left after burning of sacred offerings such as cow dung, wood, etc. in particular rituals such as yajna. It is considered sacred and you can apply it on your forehead to get connected to Lord Shiva. You can apply it after taking bath so the God's blessings are always upon you. You can use it in puja rituals by applying it to the idols in your home. It can also be used for healing purposes as it contains the good energies of the divine. Get vibhuti from Giri UK.