Google Search results: Ads appear on the top and on the right when users key in the keywords that you have chosen. e.g. “pilates singapore”. These keywords have to be chosen carefully so you only get clicks that match customers’ interest and your products.
 As the term implies, pay per click (PPC) means you only pay when customers click your ads, instead of how many times your ads are shown.

Gmail: Google text ads appear similarly on the top and right hand side. This mode of Google online advertising enables your products and services to reach a huge audience. As of November 2010, Gmail had 193.3 million users monthly.
 Ads can be on pay per click (PPC) or cost per thousand impressions (CPM).

YouTube : Image ads appear in video or on the right hand side. As of February 2011, YouTube has 490 million unique users worldwide per month.
 Ads can be on pay per click (PPC) or cost per thousand impressions (CPM).
 

Online advertising enables your business to reach huge audience with rich media content, especially great for branding campaigns.

Google Display Network : Text/image/video ads appear on Google Display Network including Singapore local sites like hardwarezone.com.sg, streetdirectory.com, MediaCorp.sg, AsiaOne.com. The Google Display Network reaches 75% of unique internet users in over 100 countries and 20 languages on hundreds of thousands of sites across the web.
 
On the Google Display Network, in addition to pay per click (PPC), ads can also be paid for using cost per thousand impressions (CPM).

Mobile Phone Apps : Text/image ads on mobile phones are very prominent on the small area on mobile phones. “Users of the iOS and Android platforms regularly spend at least 79 minutes a day using apps” Reach your customers on iPhone, Android, Windows Mobile etc. through AdMob.
Ads can be on pay per click (PPC) or cost per thousand impressions (CPM).