ABOUT TVing PROCESS!

i just want to know how the tv process happens?
for example how they get in your computer?
somebody plz explain it to me/

You Tell them your id or yur tv and password and then they can control your computer.

You download a program called team viewer(google it).
You will be alloted a tv id and tv password. The person who wants to TV you will ask for that id and password and will be able to view your desktop and control your mouse etc. You can kick them out at anytime