How do i move the camera around?

hi, im knew here. i found out the answer to the other post so im making a knew one. how do i move the camera around? i mean i got it for a second but i forgot how i did it… please reply i really just want to animate! D:

http://www.nolanscott.co.nz/tutorials/creating-cameras.html
(no sound, it’s all fairly simple and straightforward)