The Track column is used in the Savings & Debt solution to track if a category is a part of the Savings or Debt track, and is automatically added when installing that solution. When a category is marked either Savings or Debt, that category will be available to select on the Savings & Debt sheet.
The Statement column is used in the Statement Details solution to tie a transaction to a particular statement. This column is also automatically added when you add this solution.