Upload a document to a library with PowerShell

I have a standalone 2013 SharePoint installed on a Win2012R2 which I am playing with.

When I click "Home" in the navigation this is my URL

http://winsrv01/_layouts/15/start.aspx#/

I created a new library name "SharePoint Doc Lib".

When I click on that library this is my URL:

http://winsrv01/_layouts/15/start.aspx#/Sharepoint%20Doc%20Lib/Forms/AllItems.aspx

Now I what to upload a file to this document library with powershell. Looking at this how to it seems pretty easy:

# Set the variables 
$WebURL = “http://portal.contoso.com/sites/stuff” 
$DocLibName = “Docs” 
$FilePath = “C:\Docs\stuff\Secret Sauce.docx” 


# Get a variable that points to the folder 
$Web = Get-SPWeb $WebURL 
$List = $Web.GetFolder($DocLibName) 
$Files = $List.Files 

# Get just the name of the file from the whole path 
$FileName = $FilePath.Substring($FilePath.LastIndexOf("\")+1) 

# Load the file into a variable 
$File= Get-ChildItem $FilePath

# Upload it to SharePoint 
$Files.Add($DocLibName +"/" + $FileName,$File.OpenRead(),$false) 
$web.Dispose()

1. But what will my URL be?
2. What is that _layouts all about?
3. What should the direct link to my library be?