As of my last knowledge update in January 2022, Quizizz is an online learning platform that allows teachers to create and share quizzes with their students.1
References
1Hariyastuti A, Triana V. The effectiveness of using quizizz to improve the achievement of indonesian language learning outcomes on synonyms and antonyms material in grade 5 elementary school students. Jurnal Pendidkan Dasar Nusantara. 9(2):182-195. doi:10.29407/jpdn.v9i2.21293