burning cd-dvd in macbook air

If you just want to save data to an optical disk no software is required. See this article: https://support.apple.com/guide/mac-help/burn-cds-and-dvds-mchl8addfd95/mac

If you want to burn a music CD see this article: https://support.apple.com/guide/music/create-your-own-cds-and-dvds-mus890140c28/mac

If you want to burn a DVD playable on a DVD player I only know of one free DVD burner that is decent and I haven't used it since High Sierra was released so I'm not sure it still works. It is called Burn. https://burn-osx.sourceforge.io/Pages/English/home.html

iTunes will do the job along with disk Utility.