What does the American lottery mean?

American lottery generally refers to American immigrant lottery, also known as green card lottery or DV lottery. DV means diversity visa, which means "diversity visa". Every year, according to national restrictions and regional quotas, the State Council provides a number of diversified visas for permanent residence in the United States around the world. These visas are allocated to eligible applicants by random lottery. Because the number of applicants far exceeds the number of visas, this lottery procedure attracts great attention and discussion every year.