The service in this article is either for development purposes or for people who are running dedicated home servers (which means they have a Linux desktop that they keep on 24/7 without rebooting and are usually programmers and/or system administrators).

1) Copy folder to Dropbox subfolder

OR

1a) Go to Preferences->Sync->select which folders to sync -> add the folder that you want to share

2) right-click on it and select Share Dropbox Link

3) copy the link and send it via email/whatsapp