Probably from the last coach. You can write any notes you want for yourself there and save them.
For ex , I have jumped in and out of new teams so often and I usually carry multi teams. So when I first pick up a team I put down the Off and Def formations that have been practiced so I know what formations I have to recruit for. Looks like this: Pro and Nickel . (this is what mine might look like but like I said you can put down anything you want to there.