If you are one of those event-profs who constantly customizes games for your clients, then a collaborator link can make the exchanging questions with the customer phase much shorter.
If a  client needs to add their own questions, then getting them over email and applying changes is painful and time consuming. You have to dig into how the client has marked correct answers and how they suit the game format. Also these questions might arrive in Word, e-mail, Excel, as a screenshot or some other odd format.

That is why in Loquiz you have Collaborators option. This means that anyone you share a link with can enter questions to your Loquiz account. What is important, they do not have to register as a user and they do not see your other questions or any games.

It is also cool that clients can any time change questions themselves if needed. But before the event, just close the collaborator link and no one can access or alter these questions any more.

Collaborator link is also useful to use on a mobile device when you want to create questions on spot. 

Check it out how to invite clients to collaborate from the video: