After opening the page Applications the second tab you will see is the Pool Candidates tab.

The following functions are available here: 

•  on the right-hand side, a collection basket for mass processing
•  here you can limit the view by filters
•  If you click on it, you can set a pin for a keyword. This keyword card is thus always displayed at the top of the page. 

The card shows you the number of applications behind the keyword/the pool and the keyword. Clicking on the keyword opens the application list, which shows you all applications in the status of pool candidate with the keyword.