Whole Pitch Pressing

You use whole pitch pressing when your offensive players outnumber their defensive players.

You should only use own half pressing most of the time. Whole pitch pressing is useful tho when they are light at the back. For example, when playing against 3w defence (DL DC DR) and you have two strikers on their single DC, it is worth your strikers pressing him for a chance to nick the ball off him for a goal scoring chance.

But do remember that you need to have offensive players that have okay marking and tackling ratings to pull it off.

Also, I tend to find that players tend to tire easily with whole pitch pressing and I tend only to use it until I score the first goal then switch it back to own half.