Traffic Manager versus Azure Load Balancer

Hi All,

We have an MVC5 app which we are planning to host either as an Azure Web App or Azure Web Role. The queries that we have is pertaining to load balancing of the same as follows:

1. When we spawn multiple instances of Web Apps or WebRoles, does Azure Load Balancer automatically kick in?

2. If the above case is true, then when is the need for the Traffic Manager? Is it used when instances are spanning across multiple regions?

3. Will Azure load balancer suffice my requirement if I am hosting my app only in a single region?

Regards, Saurabh