[Query] What's the significance of connections attribute in Rpush::App model?

[raghvendra]

In the documentation following is mentioned as a way of creating Rpush App

app = Rpush::Apns2::App.new
app.name = "ios_app"
app.certificate = File.read("/path/to/sandbox.pem")
app.environment = "development"
app.password = "certificate password"
app.bundle_id = "BUNDLE ID" # the unique bundle id of the app, like com.example.appname
app.connections = 1
app.save!

What's the significance of connections property here?
Connections to what entity are we talking about here?

Thank you!