A microphone jack.
Only if the microphone is a Bluetooth microphone.
It plugs into the computers Microphone jack. Make sure you don't plug it into the Headphone jack.
Headphone, because audio is going OUT (mic is giong IN).
One can find cheap deals on USB headsets with a microphone at an electronics store, such as Best Buy. They can also be found online at sites such as Amazon.
The mic is right next to the headphone jack on the top left of the iPad.
green headphone jack on the back of the computer
A local electronics store should have one. Counter-Strike doesn't need a specific one, but make sure is comes with a microphone.
This is very simple. Get A 2 sided 3.5mm headphone jack and plug one end into the microphone port and the other into the headphone jack.
It is at the top in the middle of the headphone jack and sleep/wake button.
The cheapest microphone available from the Best Buy website is $3.30. The cheapest microphone available from the Amazon web store is $1.95 plus shipping costs.
A cheap microphone will have less sensitivity than a studio condenser microphone.