A Poster is a person who's looking to get tasks completed, whether it's in person or online.
It's free to post a task, so if you have something you need done, simply create an account and describe it to the community. Taskers will then be able to make an offer to complete your task and you can view their profiles and decide who to pick.
When you accept an offer, you'll add funds into our escrow system, Airtasker Pay, which holds the payment securely until the task is completed. Once you've assigned someone, you can also private message them to discuss further details about the task and exchange contact information.
For more information about who Taskers are, see here.