If you have a blog or a website and are looking for a way to make money from it then i recommend joining upto Googles partnership program called Google Adsense.  Google adsense is a partnership opportunity that you will allow Google to show their adverts on your website and whenever a customer of yours clicks on their adverts you earn a commission instantly

The commission you earn depends on your content, some adverts can earn you upto $5 and some 0.20c depending on how much the advertiser has paid Google.  Google then spilts the revenue with you for placing the add on your website.  From the advertisers point of view this is called PPC (Pay Per Click) advertising via the Google Adwords network.

The great thing about Google adsense adverts is that you can easily intregrate them into your website or blog either as text or banners.  You can change the look and colour of the text to match your content which makes your reader want to click on the adverts as they will think they are part of your website so you earn commission very easily.

There is a very good plugin for wordpress that you can upload and activate and allow Google adsense to show up in your articles on pages.  Just run a search on Google for the plugin.  Installation is very easy.