What does Leviticus 7:12 mean?

If someone brings a peace offering to say thank you, they should also bring thin loaves made without yeast and mixed with oil, flat bread brushed with oil, and loaves made from fine flour mixed with oil. Leviticus 7:12 - Modern Text Bible

(When someone wants to thank God with a peace offering, they also bring different kinds of bread made with oil but without yeast.)