title: Ad Network Mediation Placements adMob
body: <p>I have been all over google trying to figure out how to turn on mediation in the adMob SDK!!!
  On there own page (https://developers.google.com/mobile-ads-sdk/docs/admob/mediation#ios) they have a step by step guide, but maybe I'm stupid or something is missing. The guide states this:</p>
  
  <blockquote>
    <p>Specify your Mediation ID instead of your AdMob site ID as the
    adUnitID of your GADBannerView. Your Mediation ID can be found on the
    settings page of the mediation placement you’ve created</p>
  </blockquote>
  
  <p>Should this be in the GADBannerView.h, and if yes... Where?</p>
  
  <pre><code>//  GADBannerView.h
  //  Google AdMob Ads SDK
  //
  //  Copyright 2011 Google Inc. All rights reserved.
  //
  
  #import &lt;UIKit/UIKit.h&gt;
  #import "GADAdSize.h"
  #import "GADRequest.h"
  #import "GADRequestError.h"
  #import "GADBannerViewDelegate.h"
  
  // The view that displays banner ads.  A minimum implementation to get an ad
  // from within a UIViewController class is:
  //
  //   // Create and setup the ad view, specifying the size and origin at {0, 0}.
  //   GADBannerView *adView =
  //       [[GADBannerView alloc] initWithAdSize:kGADAdSizeBanner];
  //   adView.rootViewController = self;
  //   adView.adUnitID = @"ID created when registering my app";
  //
  //   // Place the ad view onto the screen.
  //   [self.view addSubview:adView];
  //   [adView release];
  //
  //   // Request an ad without any additional targeting information.
  //   [adView loadRequest:nil];
  //
  @interface GADBannerView : UIView
  
  #pragma mark Initialization
  
  // Initializes a GADBannerView and sets it to the specified size, and specifies
  // its placement within its superview bounds. If |size| is invalid, an
  // instance of GADBannerView is not created and nil is returned instead.
  - (id)initWithAdSize:(GADAdSize)size origin:(CGPoint)origin;
  
  // Initializes a GADBannerView and sets it to the specified size, and specifies
  // its placement at the top left of its superview. If |size| is invalid, an
  // instance of GADBannerView is not created and nil is returned instead.
  - (id)initWithAdSize:(GADAdSize)size;
  
  #pragma mark Pre-Request
  
  // Required value created in the AdSense website.  Create a new ad unit for
  // every unique placement of an ad in your application.  Set this to the ID
  // assigned for this placement.  Ad units are important for targeting and stats.
  // Example values for different request types:
  //     AdMob: a0123456789ABCD
  //       DFP: /0123/ca-pub-0123456789012345/my-ad-identifier
  //   AdSense: ca-mb-app-pub-0123456789012345/my-ad-identifier
  // Mediation: AB123456789ABCDE
  @property (nonatomic, copy) NSString *adUnitID;
  
  // Required reference to the current root view controller.  For example the root
  // view controller in tab-based application would be the UITabViewController.
  @property (nonatomic, assign) UIViewController *rootViewController;
  
  // Required to set this banner view to a proper size. Never create your own
  // GADAdSize directly. Use one of the predefined standard ad sizes
  // (such as kGADAdSizeBanner), or create one using the GADAdSizeFromCGSize
  // method. If not using mediation, then changing the adSize after an ad has
  // been shown will cause a new request (for an ad of the new size) to be sent.
  // If using mediation, then a new request may not be sent.
  @property (nonatomic) GADAdSize adSize;
  
  // Optional delegate object that receives state change notifications from this
  // GADBannerView.  Typically this is a UIViewController, however, if you are
  // unfamiliar with the delegate pattern it is recommended you subclass this
  // GADBannerView and make it the delegate.  That avoids any chance of your
  // application crashing if you forget to nil out the delegate.  For example:
  //
  //   @interface MyAdView : GADBannerView &lt;GADBannerViewDelegate&gt;
  //   @end
  //
  //   @implementation MyAdView
  //   - (id)initWithFrame:(CGRect)frame {
  //     if ((self = [super initWithFrame:frame])) {
  //       self.delegate = self;
  //     }
  //     return self;
  //   }
  //
  //   - (void)dealloc {
  //     self.delegate = nil;
  //     [super dealloc];
  //   }
  //
  //   @end
  //
  @property (nonatomic, assign) NSObject&lt;GADBannerViewDelegate&gt; *delegate;
  
  #pragma mark Making an Ad Request
  
  // Makes an ad request.  Additional targeting options can be supplied with a
  // request object.  Refresh the ad by calling this method again.
  - (void)loadRequest:(GADRequest *)request;
  
  #pragma mark Ad Request
  
  // YES, if the currently displayed ad (or most recent failure) was a result of
  // auto refreshing as specified on server.  This will be set to NO after each
  // loadRequest: method.
  @property (nonatomic, readonly) BOOL hasAutoRefreshed;
  
  #pragma mark Mediation
  
  // Gets the underlying ad view of the mediated ad network.
  // You may use this to find out the actual size of the ad and adjust
  // GADBannerView to fit the underlying ad view.
  @property (nonatomic, readonly) UIView *mediatedAdView;
  
  @end
  </code></pre>
  
  <p>If not, should there be an .m file for this???</p>
  
  <p>Please help... I'm going crazy!</p>