Here's a video by Park Tools on bedding in your disc brake pads:
I have to admit that the last three bikes I purchased had disc brakes and I just rode them with no break-in procedure, with one exception. I did make sure not to use the
brakes lightly for the first few rides. By lightly, I mean lightly applying the brakes and stopping over a longer distance.
Instead, I waited a bit longer before braking and applied more stopping power than usual.
Lightly applying the brakes on new rotors and pads can cause them to glaze over and impact the bike's braking performance.
I was told to go light and pump the brakes for the first few rides. Nothing too hard and heavey. Now at 500 miles they’re great as far as I’m concerned.
your depositing brake pad material on the rotor evenly. if you stop you leave a lump. with really strong brakes you can feel a huge difference as the pad bed in. I just run up and down a street almost stopping lightly several times then harder. then I brake carefully for a bit of the ride till they feel normal.