A Donor Advised Fund allows you to separate the careful timing of the tax deduction of a charitable gift from when you want the charity to receive your donation. You get the deduction when you transfer funds to your Donor Advised Fund, but the organizations you support get the money whenever you designate a grant be given to them. This subtle difference can allow significant savings for your tax planning.
You can use this time separation to take the standard tax deduction most years while you designate grants from your Donor Advised Fund. Then, every few years itemize your tax deductions and replenish your fund with new charitable giving.