Lubuntu 20.04 what is the meaning for settings in FSTAB ?

[aug7744]

Lubuntu 20.04 installed in BTRFS partition.
In FSTAB file has the lines
defaults,noatime,space_cache,autodefrag 0 2
What is the action that each setting above is doing in system ?
Thanks for reply.

 

[LorenDB]

This article on fstab says "<options> Mount options of access to the device/partition (see the man page for mount)." That leads me to this article, which tells about the different options.