Three numbers, and what each one is actually telling you.
What you own minus what you owe — but only counting the things you have chosen to include. By default that means every financial account, all property, and your vehicles and valuables. Household goods are left out, because furniture and appliances rarely sell for anything near what they cost.
You control this in Settings › Preferences › Customize what counts. You can include or exclude your primary residence, vehicles, valuables, and household goods. Financial accounts always count.
What you could reasonably reach if you needed money — cash, bank accounts, investments, crypto, and insurance with a cash value — minus the debts that are not tied to a physical asset, such as credit cards and personal loans.
Your mortgage is not subtracted here, because the house it is secured against is not counted either. This definition is fixed and does not follow your inclusion settings, so it means the same thing for everyone.
The total value of everything you record but deliberately keep out of net worth. It is shown so nothing you own ever disappears silently. The Excluded from Net Worth report breaks this figure down item by item and tells you why each one is out.
The button that opens a single screen listing everything you own and owe, so you can refresh a month's worth of balances without visiting each record. See Keeping values current.
WorthSafe User Manual