I know Package Manager like NuGet help us when we want to use third party components. 

From Nuget Codeplex Page:

> 
> NuGet is a free, open source developer focused package management
>  system for the .NET platform intent on simplifying the process of
>  incorporating third party libraries into a .NET application during
>  development.
> 
> 
> There are a large number of useful 3rd party open source libraries out
>  there for the .NET platform, but for those not familiar with the OSS
>  ecosystem, it can be a pain to pull these libraries into a project.
> 
> 
> Let’s take ELMAH as an example. It’s a fine error logging utility
>  which has no dependencies on other libraries, but is still a challenge
>  to integrate into a project. These are the steps it takes:
> 
> 
> 
> ```
> Find ELMAH
> Download the correct zip package.
> “Unblock” the package.
> Verify its hash against the one provided by the hosting environment.
> Unzip the package contents into a specific location in the solution.
> Add an assembly reference to the assembly.
> Update web.config with the correct settings which a developer needs to search for. 
> 
> ```
> 
> And this is for a library that has no dependencies. Imagine doing this
>  for NHibernate.Linq which has multiple dependencies each needing
>  similar steps. We can do much better!
> 
> 
> NuGet automates all these common and tedious tasks for a package as
>  well as its dependencies. It removes nearly all of the challenges of
>  incorporating a third party open source library into a project’s
>  source tree
> 
> 
> 

these steps are simple tasks that we do when we want to setup a project. its only for automation of adding 3rd party components and decrees chance of Error in configuration files? or it has much more responsibilities !?