Edited: Jan 21
You can add quizzes to your site by adding the HTML code using the HTML code element. You can also search the Wix App Market for suitable third-party apps.
You can create your own quizzes with forms and Wix Code. See these examples for making your own forms:
Create a basic form without writing a line of code. Use input elements, a dataset, and a button to capture and store user input in a database collection.
Collapse and expand sections of a form.
Split a form into multiple stages using a slideshow.
Use the forms for the user to enter in their quiz answers, and then provide the code needed to determine success. You can add a database collection to hold quiz questions and answers, and another collection to store the results of the users.
With Wix Code the sky is the limit.l