DeFi balance sheet or Decentralized Finance Balance sheet is a consolidated birds eye view of all DeFi assets for a portfolio. While the DeFi section gives a detailed and punctilious view of all your DeFi positions across 1000s of DeFi applications, the DeFi balance sheet aggregates all that data and converts it to a simple balance sheet.
The balance sheet contains two sections - Credit and Debt. If you expand on the DeFi balance sheet you can see the breakdown of your Credit and Debt positions. Credit positions contain assets which earn some form of yield or return. These are tokens supplied, farmed, LPed, rewarded, staked, lent, etc. Debt positions are borrowed liabilities.