Can someone spell out what this wget command to install Heroku toolbelt does?

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http://askubuntu.com – I'm getting familiar with the terminal commands, and I came across this command to install the Heroku toolbelt: wget -qO- https://toolbelt.heroku.com/install.sh | sh Now from here I gather that wget is used to download files from the internet through various supported protocols, and they'll download even if I logoff. Is that right? And I wanted to know two more things about that command : I see -q0- in the code. What does it mean? From manpages I see that -q is used to turn the output of Wget off. But what does that mean too? And how is using -q different from -q0- What is the |sh at th (HowTos)