What does Leviticus 14:21 mean?

If the person is poor and can't afford all this, they can bring one lamb for the guilt offering to be waved and to make things right, plus a small amount of fine flour mixed with oil for the grain offering, and some oil. Leviticus 14:21 - Modern Text Bible

(There's a provision for those who can't afford the full ritual, showing compassion and making sure everyone can be restored, no matter their means.)