How can I use the categories and statuses to flag a candidate as selected or discarded?

It's easy! Just move the candidates between the different categories and statuses as they move forward in the recruitment process. Here's an example:

You can also move candidates by dragging and dropping their card in the status you want. 

Remember that you cannot edit the categories names and order. However, you can create, edit, duplicate and delete all the statuses you want.

In addition, you can schedule automatic emails to be sent for each of the statuses. It's definitely a dream come true! You can automate emails to inform the candidates each time they move forward in the recruitment process, as well as when they are selected or discarded.