In non-technical terms, the "User Blob" is essentially the of your specific farm. It contains all your data: your level, the placement of your animals, your crops, your coins, and your inventory.
The Blob looked around the farm. It saw the overflowing silos and the massive red barn. Feeling a digital instinct to be useful, the Blob tried to help. It rolled over to a full patch of wheat and absorbed the harvest instantly. A red warning flashed in the sky: Barn is Full! user blob farmville 2