Quizzes can be a very fun help in the classroom. Just for fun at the end of a lesson it can help revising what was learnt, but the mot interesting use might be to enforce a flipped lesson. Make the quizzes worth a few marks and give your students an easy quiz at the beginning of a lesson and it will definitely increase the proportion of students who have studied the content before hand.
Another interesting use I have been doing is to ask students to prepare quiz questions as you teach a content, making them reflect about what they are learning (thus achieving a higher level of thinking and deeper learning). I have been doing it in conjunction with Google Forms: as they write their questions as if they were answering a form you have their questions and answers' options in a spreadsheet, that you can later upload to transform into a quiz (in Quizizz).
In times of online learning you can also use it as exams, even with open-ended answers (in Quizizz), and marking will be much easier.
Apart from that, maybe the most common and very interesting use is to have easy quizzes, that students can answer even while going to school, and learn by answering. This works well with easy quizzes, that are designed to learn almost by choosing the not-stupid answer.
All this I have been using in the Quizizz platform, where students always have the questions in their devices, you can upload questions through spreadsheets, there are many answer options (as open-ended answers), you can use in connection with Google Classroom (for assigning games, homework or exams, is great) and there are several settings possibilities (as allowing students to take the quiz several times, great when the objective is learning, or only once, as in exams).
Click here to see the quizzes I have created for teaching economics.