What's the function of the Venturi Tube on a Tiptronic?

[KRAM36]

Can someone explain what the function of the Venturi Tube on a Tiptronic is? Is it sucking in air or pushing in air into the intake system? What does it do for the Tiptronic trans?

In my picture you can see that it connects into the intake system at 2 spots and both are after the MAF sensor.



I tried Googling it several ways, but you know how Google has become. It only pays attention to Boxster and Tiptronic, so I get results for Boxsters for sale with a Tiptronic instead of the answer to the question I asked.

Thanks!