Forge provides multiple verbosity levels controlled by the number of v flags:

• Default: Shows test results only
• -v: Shows logs for failing tests
• -vv: Shows logs for all tests and gas usage
• -vvv: Shows execution traces for failing tests
• -vvvv: Shows execution traces for all tests and setup
• -vvvvv: Shows execution and setup traces, plus internal steps
  Higher verbosity levels are crucial for debugging failed tests and understanding gas consumption patterns.