Heroku?

I'm admittedly not very computer literate so, for some, this may constitute a dumb question. I'd still like to know the answer. 

Just recently, I noticed that every time I did a Google search for AudiogoN, one of the first results that popped up was Heroku. 

I looked up Heroku and it is apparently a "cloud app platform". 

What does this mean in terms of accessing the site?