What is Water Budgeting?

And why is it so hard to find a straight answer online here? Nothing addresses the situation of someone like me who has zero idea what it even is. I got an alert on my iphone that water budgeting has been enabled and then it disappeared. I need to know what this is and how it affects my schedule. Please advise.

Water Budgeting is now called seasonal shift. If is a weather intelligence option on some schedule types. It adjusts watering times each month to account for seasonal climate changes (i.e. water less in cooler seasons).
It is August 1, so you might see notifications that schedule durations are being adjusted at the beginning of the month.
If someone from Rachio is reading, they might check and fix any out of date notification message formats.