How to invite others to work with?

You may invite others to work together in your campaign. Inviting others is easy: after logging in, on the tasks page, click Create Task, enter task details, and enter a username (if the task assignee is registered user on Buildinkapp) or enter an email address (if the task assignee is new to Buildlinkapp), click Create Task. An invitation email will be sent to the assignee.
On Professioinals Page, you can also easily invite users to your campaigns.