What does "Trial projects" on GetAFreelancer.comTrial Project mean?

It means Great Chance for new GAF members

Here is the official explanation,

Trial projects connect new service buyers with new providers.

For providers(You),
Only non-rated providers may bid on Trial projects. New service providers get a better chance to win a Trial project.

For buyers,
Buyers who haven't posted any projects, are allowed to post a trial project once. It's completely free to post a Trial project.

All trial projects are manually approved by GetAFreelancer Support team.