I'm not sure if this is something you guys want to talk about or if it has already been covered so I'll keep it short and basic to start.
This is for the front brakes.
The rear brake is another topic and would be what I would consider an "advanced" skill....or onr that can hurt you if your hamfisted...or footed in this case but if use "correctly" the rear brake can be used to settle the chassis, tighten your line in a corner and is also useful when riding two up.
Back on topic, I sent young Master Virt a copy of a thread I started on the other board..... it was in response to a guy on there stating that "you are in less control of your bike when you are on the brakes"
Over here we have MSF to teach basic riding skills and I have had to re-teach a few folks to ride as they sound like the basic course there..... four finger on the brake, pull the clutch in....wonderful stuff.
Though I was made to feel old as I was talking about the school I went to where this was taught and was told by the same fine lad the "Track Schools" really don't teach you the real way to go fast....
I did reply, well it was Freddie Spencer's school..... only to get back "Should I know who that is?"

So here you go..... the video was pretty much the same as my intro to the topic as the instructors are the same except now it's Scott Russell instead of Freddie.
Well as ridding season will be starting for some of you guys soon, it seems like a good time to cover the subject of braking again.
That and the comment recently, by another member, that using the brakes reduces you control of the bike.
So the whole idea of trail braking is to being on the brakes all the way to the apex of the corner, while slowly trailing them off. Then back on the throttle.
The two main things this does is first by loading the front tire, you increase the size of the front contact patch (yes giving you more usable traction)
Second it compresses the forks, which gives you a steeper trail angle, so the bike will actually turn quicker.
I could go on but I'll let these guys walk you through it.....