The idea you had in July, back in front of you in September.
A blip is a thought you are not ready to do anything with yet. Casey keeps hold of it and puts a few on your Today page each morning, picked at random from everything you have parked.
You type one line and get on with your morning. There is no folder to choose and nothing to organise afterwards.
It turns up beside that day's writing. Sometimes you act on it. Most days you read it again and leave it where it is.
The tally shows how often an idea has come back. When the same one keeps returning, that is usually worth paying attention to.
The ideas you have seen least often come back soonest, so nothing sits at the bottom of a list for a year going stale.