A DPO, or Direct Public Offering, is the procedure pursuant to which a private company goes public without giving the possibility to a smaller number of investors to purchase the stock at an offering price. So, if a company goes public through a DPO, a potential investor could only buy the shares of the company once the company is available on the stock market.
Impossible Foods has not yet decided whether or not they would want to go public, and therefore there is certainty on how they would do so if they would decide to do it.