diff --git a/README.md b/README.md
index 9b1f47b..64f784c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,28 @@
 grub-btrfs
 ==========
 
+This is a version 0.xx of grub-btrfs :
+
 grub-btrfs, add support for btrfs snapshots into grub menu
+
+What does grub-btrfs v0.xx do :
+
+Simple rollback using snapshots you made previous.
+
+Makes a list of all snapshots, kernels, initramfs present on the filesystem and then creates a corresponding entered with name and date of snapshots in grub.cfg, which ensures a very easy rollback.
+
+How to use it :
+
+Edit 41_snapshots-btrfs file :
+
+submenuname = name menu appear in grub
+prefixentry = add a name ahead your snapshots entries
+nkernel= name kernel you use it
+ninit= name initramfs (ramdisk) you use it
+intel_ucode= name intel microcode you use it
+
+Generate grub.cfg (on Archlinux is grub-mkconfig -o /boot/grub/grub.cfg )
+
+grub-btrfs automatically generates snapshots entries.
+
+you will see it appear different entries, e.g : Prefixentry name of snapshot [2013-02-11 04:00:00]