Can someone explain “heroku ps:scale web=1”

Question

I\'m looking for a straightforward explanation of what all happens when I enter the following command:

heroku ps:scale web=1 

What is Hero

Answer 1

You scale the number of web dynos to 1.
I would say there is a lot of docu about this topic.
https://devcenter.heroku.com/articles/scaling
https://devcenter.heroku.com/articles/dynos