In some modern distributions like Ubuntu, there are preconfigured user directories like Desktop, Download, Documents, Images, Music, Vidéos.

ubuntu_user_dirs.png

You can remove some of the directories you don't use, or rename some of them.

If you change their name, you can set their new place in your ~/.config/user-dirs.dirs file:

# This file is written by xdg-user-dirs-update
# If you want to change or add directories, just edit the line you're
# interested in. All local changes will be retained on the next run
# Format is XDG_xxx_DIR="$HOME/yyy", where yyy is a shell-escaped
# homedir-relative path, or XDG_xxx_DIR="/yyy", where /yyy is an
# absolute path. No other format is supported.
# 
XDG_DESKTOP_DIR="$HOME/Bureau"
XDG_DOWNLOAD_DIR="$HOME/telech"
XDG_TEMPLATES_DIR="$HOME/"
XDG_PUBLICSHARE_DIR="$HOME/public"
XDG_DOCUMENTS_DIR="$HOME/docs"
XDG_MUSIC_DIR="$HOME/zic"
XDG_PICTURES_DIR="$HOME/images"
XDG_VIDEOS_DIR="$HOME/cine"

Then restarting Nautilus should be sufficient. Otherwise restart your Gnome session.

References: