Test points and test rings are used in electronic circuits to provide convenient access for testing and measurement. Test points are small terminals or pads on a circuit board where probes can be attached for voltage, current, and signal testing. Test rings are circular conductive areas that provide similar access for testing. These components are essential for debugging, troubleshooting, and verifying circuit performance during development and maintenance. Their ability to provide easy and reliable access for testing makes them valuable tools in electronic design and testing.