Here’s the methodology according to the YouGov website:

Methodology: This article includes findings from two U.S. News surveys conducted by YouGov on two nationally representative samples of 1,000 U.S. adult citizens interviewed online from January 14-20, 2022. The first survey included questions on groups involving race, education, income, family, gender, and sexuality, while the second survey included questions on religion, politics, and other miscellaneous groups. The samples were weighted according to gender, age, race, and education based on the 2018 American Community Survey, conducted by the U.S. Census Bureau, as well as 2016 and 2020 Presidential votes (or non-votes). Respondents were selected from YouGov’s opt-in panel to be representative of all U.S. citizens. Real proportions were taken from a variety of sources, including the U.S. Census Bureau, the Bureau of Labor Statistics, YouGov’s internal poll results, and the results of other well-established polling firms. Most estimates were collected within the past three years; the oldest is from 2009. Because the real estimates presented cover a range of time periods, they may differ from actual population sizes at the time our survey was conducted.