In Freelancer, clients are allowed to post their jobs and projects, all for free. The Freelancer forum is ideal for larger and more complex jobs/projects. Upon posting their job projects, the clients have two options:
They can make their job projects open and invite different freelancers to bid on them.
They can visit different freelancer profiles themselves, looking for freelancers who meet their exact requirements. If they find such a freelancer, the clients can then make an offer.
When clients make their jobs open for all freelancers, they can get freelancers with the lowest rates. On the other hand, when clients decide to look for freelancers themselves, they can choose freelancers with the best quote and skills for the job. However, the downside is that such freelancers with the best quote and skills have higher rates.

Difference 101