The Daily Tasks are requirements that are used to complete certain tasks and obtain Pokebux, was added during the Massive Update.
To do a Daily Task, you must join the official group of the game, once done, when you join the game a task will appear that you will have to complete, it appears daily and you can accumulate up to 3 tasks on the board. The board is located in the lobby (click on the small icon, below to the left) and in the Deep Marine Community, in a light green house. The amount of Pokebux you can get can be between 25 to 100 (previously between 10 to 25) depending on the difficulty of the tasks. When you complete a task, will appear a green notification that you have obtained Pokebux.
In this list, it shows all the different types of tasks that are in the game: