Projects are a way for categorizing and organizing your bio lincs or shortened links. You can think a project as an folder and a biolinc as an file inside the folder.
Here you can see the list of the projects you already have and also add a new one (this is based also on the plan you have, if you are on free plan there you can add only one project)
You can add a project by clicking toCreate Projectbutton, put the name of the project at the popup and then click onCreatebutton. After that you can find your added project to the list.