What does Leviticus 1:15 mean?

If your offering is a bird, like a dove or a pigeon, bring it to the priest. He’ll take it to the altar, pinch off its head, and burn it there. The blood will be drained out on the side of the altar. Leviticus 1:15 - Modern Text Bible

(This verse describes how to offer a bird as a burnt offering. The priest handles the bird, kills it, and pours out its blood as part of the ritual.)