The projects page serves as an organizational tool for completing various projects. These may include jobs you find on Writers Work, or they might be projects related to your blog or other personal endeavors - whatever you need help tracking.
Using the projects feature, you can keep yourself on schedule by nesting all the tasks that need to be completed within a project. You can create as many tasks as you want within a given project. You can also see a snapshot of the time you've spent on the documents for a particular project with a breakdown for each individual task. This makes it easy to keep track of how much time a project or job has taken in total, and that might be helpful for determining pricing for similar projects in the future, since you'll know how much time you will need to invest.