From the Document: "On November 6, 2019, Acting Secretary of Homeland Security Kevin K. McAleenan announced the designation of Poland into the Visa Waiver Program (VWP). The VWP allows citizens of designated countries to visit the United States without obtaining visas. Poland--one of five EU countries that until now had not been designated into the VWP--had been working with the Department of Homeland Security (DHS) for over a decade to meet the program's criteria (see list of criteria below). In FY2019, Poland met the requirement of having a nonimmigrant visa refusal rate below 3%. On October 4, 2019, President Trump announced that the Department of State formally nominated Poland for the VWP, and one month later DHS announced its designation into the program. Polish nationals will be able to apply online for travel authorization starting November 11, 2019."
CRS Insight, IN11197
Congressional Research Service: https://crsreports.congress.gov/