Terms and conditions are a fundamental part of each website because they have great advantages both for users and administrators in terms of liability and security. Putting it in a pop-up window reduces the probability for users to leave the page.
PROTECT YOURSELF AND YOUR CUSTOMERS WITH TERMS AND CONDITIONS. A MODAL WINDOW TO INFORM THEM WITHOUT MAKING THEM LEAVE THE PAGE
Putting Terms and Conditions into your website is one of the best moves a site owner might make, because they can protect a website, especially e-commerce, from possible legal disputes.